| Absolute Hunter Jumpers | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Sammamish |
| Aleron Training Stables | Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson | Washington, Kirkland |
| Alexandra Brooks Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Snohomish |
| All Tacked Up Horse Riding Academy | Boarding Stable, Coaches & Trainers, Riding Lesson, Tack Shop, Horse Camps | Spanaway, Washington |
| Amber Olosky | Saddle Fitter, Myofascial release, Red Light Therapy, Equine Massage Therapist, Equine Bodywork, Coaches & Trainers, Horse Transportation, Riding Lesson | Washington, Issaquah |
| Amy Allen Horsemanship | Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson | Shelton, Washington |
| Archway Equestrian Sports | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Sammamish |
| Artois Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Olympia |
| Aspen Farms | Horseback Riding, Horse Camps, Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Trail Rides | Washington, Yelm |
| Aspen Grove Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Enumclaw |
| Bay Acres Stables | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Chimacum |
| Bay City Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Woodinville |
| Bayview Farm | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Carnation |
| Beth Anderson Ness Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Lakebay |
| Blue Diamond Ranch | Riding Lesson, Trail Rides, Horseback Riding, Boarding Stable | Washington, Roy |
| Blue Heron Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson | Poulsbo, Washington |
| Bolender Horse Park | Boarding Stable, Coaches & Trainers, Horse Show, Horseback Riding, Riding Lesson, Trail Rides | Washington, Silver Creek |
| Brackenhollow Stables | Horseback Riding, Riding Lesson | Washington, Redmond |
| Brindle Ridge Farms | Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Ridgefield |
| Brookside Equestrian | Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Snohomish |
| Burkeridge Farms | Coaches & Trainers, Hay Provider, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Ellensburg |
| Burkwood Farm | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Horseback Riding | Washington, Blaine |
| Caber Farm | Coaches & Trainers, Riding Lesson, Trail Rides, Horseback Riding | Washington, Onalaska |
| Cadbury Farm | Riding Lesson, Horseback Riding, Boarding Stable, Coaches & Trainers | Washington, Carnation |
| Cadence Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Auburn |
| Canter Lane Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Olympia |
| Cantera Equestrian | Equine Bodywork, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Ridgefield |
| Capstone Farm | Coaches & Trainers, Horseback Riding, Riding Lesson | Issaquah, Washington |
| Capstone Training | Riding Lesson, Horseback Riding, Boarding Stable, Coaches & Trainers | Washington, Snohomish |
| Cavallis at Misfit Farms | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Redmond |
| Cedar Meadow Farm | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Snohomish |
| Centerline Riding Academy | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Woodinville |
| Centerline The English Riding Academy | Coaches & Trainers, Riding Lesson, Boarding Stable | Washington, Woodinville |
| Chastain Mist Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Olympia |
| Chenois Creek Horse Rentals | Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Ocean Shores |
| CJB Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Spokane |
| Clover Valley Riding Center | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Port Orchard |
| Coastal Equine Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Ferndale |
| Collinswood Farm | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Stanwood |
| Copple Show Horses | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Rochester |
| Corbett Stables | Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Redmond |
| Cornerstone Equestrian Center, Inc. | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Winlock |
| Cougar Mountain Stables | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Renton |
| Crazy Horse Natural Horsemanship | Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Redmond |
| Crazy8 Stables and Trails | Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson, Trail Rides | Washington, Ridgefield |
| Creekside Stables | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Bothell |
| Creidmount Saddle Club | Riding Lesson, Horseback Riding, Horse Camps, Boarding Stable, Coaches & Trainers, Horse Show | Washington, Bellingham |
| Deanna Lally Performance Horses | Coaches & Trainers, Riding Lesson | Washington, Lake Stevens |
| Deerfield Farm | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding, Horse Camps | Washington, Preston |
| Derby Farms | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Woodinville |
| Diamond Bar K Performance Horses | Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Yakima |
| Double S Quarter Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Bow |
| Dreamswept Farm | Riding Lesson, Horseback Riding, Boarding Stable, Coaches & Trainers | Washington, Kettle Falls |
| Dressage Dancers | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Woodinville |
| Dutch Mills Farm | Boarding Stable, Riding Lesson, Coaches & Trainers, Horse Show, Horseback Riding | Washington, Arlington |
| Dynasty Stables | Boarding Stable, Breeder, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Kent |
| Eagle Ridge Equestrian Center | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Arlington |
| Elizabeth Youatt | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson | Washington, Snohomish |
| Emerson Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Ridgefield |
| Encanto Valley Farm | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Maple Valley |
| Ensbrook Farm | Breeder, Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Arlington |
| Equi-librium Equestrian | Coaches & Trainers, Horse Show, Riding Lesson, Boarding Stable | Washington, Battle Ground |
| Equidae Farm | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Snohomish |
| Erika Lee Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Monroe |
| Evolution Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Poulsbo, Washington |
| Faith Farm | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Redmond |
| Farmhill Equestrian Center | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Ridgefield |
| Farpoint Farm Training Center | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Snohomish |
| Fauntleroy Farm | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Woodinville |
| Fire Run Farm | Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Snohomish |
| Flicka Farms | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Redmond |
| Flying F Sport Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Kingston |
| Flying Horseshoe Ranch | Boarding Stable, Riding Lesson, Trail Rides, Guest Ranch, Horseback Riding | Washington, Cle Elum |
| Flying M Stables | Boarding Stable, Coaches & Trainers, Riding Lesson, Guest Ranch, Horseback Riding | Washington, Olympia |
| Forest Park Equestrian Center | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Olympia |
| Freedom Run Equestrian Center | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding, Horse Camps | Washington, Kent |
| Fuerza Equestrian | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Fall City |
| Full Gallop Eventing | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Monroe |
| Genny Miller Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Ellensburg |
| Ginger Leeper Performance Horses | Riding Lesson, Horseback Riding, Boarding Stable, Coaches & Trainers | Washington, Everson |
| Glory Days Equestrian | Horse Show, Riding Lesson, Horseback Riding, Boarding Stable, Coaches & Trainers | Issaquah, Washington |
| Gold Creek Equestrian | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Horseback Riding, Horse Camps, Rescue Organization | Washington, Woodinville |
| Gold Creek Equestrian Center | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding, Horse Camps, Rescue Organization | Washington, Woodinville |
| Golden Gait Farm – WA | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Redmond |
| Grand Farms Eventing | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Vaughn |
| Grateful Pine Farm | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Horseback Riding | Washington, Snohomish |
| GrayStone Stables & Equestrian Center | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Snohomish |
| Green Valley Stables | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Auburn, Washington |
| Greenstone Farm | Boarding Stable, Riding Lesson, Horseback Riding | Washington, Mount Vernon |
| Half Trak Farm | Boarding Stable, Riding Lesson, Horseback Riding | Washington, Stanwood |
| Happy Horse Riding School | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Burbank |
| Harbor Downs Eventing | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Auburn |
| Harmony Hill Stables | Boarding Stable, Riding Lesson, Horseback Riding | Washington, Freeland |
| Harmony Hills Stables | Boarding Stable, Riding Lesson, Trail Rides, Horseback Riding | Washington, Freeland |
| Hawkins Equine | Coaches & Trainers, Riding Lesson, Boarding Stable | Washington, Ridgefield |
| Hawkwind Farm | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Duvall |
| Healing Hearts Ranch | Riding Lesson, Horseback Riding, Equine Assisted Therapy | Washington, Olympia |
| Heritage Equestrian Center | Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Spokane |
| High Country Training | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Ellensburg |
| High Point Equestrian Center | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Tacoma |
| Hillcrest Training & Sales | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Woodinville |
| Hilltop Stables | Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Woodinville |
| Holly Farm | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Bothell, Washington |
| Hollywood Hill Equestrian Center | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Trail Rides, Horseback Riding, Horse Camps | Washington, Woodinville |
| Honey Do Farms | Boarding Stable, Riding Lesson, Horseback Riding | Washington, Carnation |
| Hunter’s Run Equestrian Center | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Horseback Riding | Washington, Maple Valley |
| Infinity Farms | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Enumclaw |
| Infinity Hunters and Jumpers | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Sammamish |
| Jeff Williams Quarter Horses | Boarding Stable, Breeder, Coaches & Trainers, Horseback Riding, Riding Lesson | Washington, Graham |
| JS Equestrian Sports | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Snohomish |
| JT Ranch | Boarding Stable, Coaches & Trainers, Riding Lesson, Trail Rides, Guest Ranch, Horseback Riding | Washington, Chattaroy |
| JumpStart Training | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Issaquah |
| Kadence Northwest Equestrian Academy | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Bainbridge Island |
| Karma Huff Training | Boarding Stable, Coaches & Trainers, Riding Lesson | Poulsbo, Washington |
| Kathryn Christensen Dressage | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Monroe |
| Keev Farm | Boarding Stable, Coaches & Trainers, Horse Camps, Riding Lesson | Washington, Olympia |
| Kellmer Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Battle Ground |
| Kelly Park Stables | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Bellingham |
| Kerri Dekubber Show Horses | Breeder, Coaches & Trainers, Riding Lesson | Washington, Blaine |
| Kimberly Mitchell Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Snohomish |
| Klear Mont Farms | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Lakewood |
| Lang’s Horse & Pony Farm | Horse Camps, Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson, Trail Rides | Washington, Mount Vernon |
| Lang’s Horse and Pony Farm | Riding Lesson, Trail Rides, Horseback Riding, Horse Camps | Washington, Mount Vernon |
| Larson Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Arlington |
| Legacy Equine Leadership Development | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Redmond |
| Legacy Hunter & Jumpers | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Woodinville |
| Legacy Hunters and Jumpers | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson | Washington, Woodinville |
| Legacy Stables – Roy, WA | Boarding Stable, Riding Lesson, Horseback Riding | Washington, Roy |
| Legends Horse Training | Coaches & Trainers, Riding Lesson, Trail Rides, Horseback Riding, Carriage Rides, Boarding Stable | Washington, Roy |
| Lisa Freimark Performance Training | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Snohomish |
| Lisa Weis Classical Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Mount Vernon |
| Little Bit Therapeutic Riding Center | Riding Lesson, Horseback Riding, Horse Camps, Equine Assisted Therapy | Washington, Redmond |
| Longacre Stables & School of Horsemanship | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Longview |
| M Bar J Ranch | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Okanogan |
| M Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Carnation |
| Magnolia Ridge Training Center | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Redmond |
| Matt Olson Horse Training | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Silverdale |
| McCann Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Graham |
| Melissa Sexton Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Okanogan |
| Meridian Equestrian Center | Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Lynden |
| Meridian Farm | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Spokane |
| Methow Valley Riding Unlimited | Riding Lesson, Horseback Riding, Equine Assisted Therapy | Washington, Winthrop |
| MI Funny Farm | Horseback Riding, Coaches & Trainers, Riding Lesson | Washington, Mercer Island |
| Midnight Mountain Stables & Arena | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Roy |
| Misty Hollow Farms | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Woodinville |
| Morning Star Farm – North Bend, WA | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, North Bend |
| Morris Stables | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Deer Park |
| Napoleon Ltd Eventing & Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Carnation |
| New Balance Training | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Snohomish |
| Noble Hunters & Jumpers | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Snohomish |
| North Cascades Equus | Riding Lesson, Horseback Riding, Equine Assisted Therapy | Washington, Lynden |
| North Star Farms – Arlington, WA | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Arlington |
| Northwest Horses | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Ridgefield |
| Northwest Natural Horsemanship Center | Horseback Riding, Horse Camps, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Fall City |
| NorthWest Therapeutic Riding Center | Riding Lesson, Horseback Riding, Equine Assisted Therapy | Washington, Bellingham |
| Northwood Stables | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Ridgefield |
| Novella Farms | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Redmond |
| Overlake Farm | Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson | Washington, Bellevue |
| Oxer Hill Farm | Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson | Washington, Snohomish |
| Pacific Northwest Riding Academy | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Oak Harbor |
| Parkside Stables | Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson | Washington, Bellevue |
| Patterson Creek Equestrian Center | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson, Trail Rides | Washington, Redmond |
| Patti Rides Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Trail Rides, Horseback Riding | Washington, Tumwater |
| Pederson Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Gig Harbor |
| Peninsula Saddle Club | Equestrian Club, Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Long Beach |
| Phoenix Farm | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Horseback Riding | Washington, Woodinville |
| Polestar Farm | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Lake Stevens |
| Polestar Farms | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Lake Stevens |
| Pond-A-Luce-A Stables | Riding Lesson, Horseback Riding, Boarding Stable, Coaches & Trainers, Horse Show | Washington, Auburn |
| Precision Performance Horses | Coaches & Trainers, Horseback Riding, Riding Lesson | Washington, Spokane |
| Precision Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson | Lynnwood, Washington |
| Quarry Ridge Farms | Boarding Stable, Horse Show, Riding Lesson | Washington, Battle Ground |
| Queenside Stables | Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Seattle |
| Raemy Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Mount Vernon |
| Rainy Day Ranch Therapeutic Riding Center | Riding Lesson, Horseback Riding, Equine Assisted Therapy | Washington, Olympia |
| Ready to Ride | Coaches & Trainers, Riding Lesson, Boarding Stable | Washington, Stanwood |
| Red Barn Arena | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Long Beach |
| Red Feather Ranch – Trout Lake, WA | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Trout Lake |
| Red Gate Farm Day Camp | Riding Lesson, Horseback Riding, Horse Camps | Washington, Sammamish |
| Red Gate Farm Training | Boarding Stable, Coaches & Trainers, Horse Camps, Horseback Riding, Riding Lesson | Washington, Sammamish |
| Red Tree Stables | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Coupeville |
| Reid Sport Horses | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Monroe |
| Reiney Ridge Horsemanship | Coaches & Trainers, Riding Lesson, Boarding Stable | Washington, Ridgefield |
| Renick Reining Horses | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Sultan |
| Rhodes River Ranch | Breeder, Coaches & Trainers, Riding Lesson, Boarding Stable | Washington, Arlington |
| Rocking B Farms | Horseback Riding, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Ridgefield |
| RockMeadow Equestrian Center | Boarding Stable, Coaches & Trainers, Horse Camps, Horseback Riding, Riding Lesson | Washington, Sammamish |
| Rolin Hill Quarter Horses | Boarding Stable, Riding Lesson, Horseback Riding | Washington, Ferndale |
| Roosters Stables | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Kennewick |
| Rossmeier Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Roy |
| Rusty Bar Ranch | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Roy |
| Sadie Kurtz | Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Everson |
| Sage Meadows | Riding Lesson, Horseback Riding, Boarding Stable, Coaches & Trainers | Washington, Redmond |
| Saur Horse Training | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Everson |
| Seattle Farm | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Seattle |
| Seattle Polo & Equestrian Club | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Seattle |
| Seeklander Horse Training | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Spokane |
| Shady Pine Ranch | Riding Lesson | Washington, Spokane |
| Sharkey Farm | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Horseback Riding | Washington, Snoqualmie |
| Shortacres Farm | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Brush Prairie |
| Silver Aspen Ranch | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Enumclaw |
| Silver Quarters | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Bow |
| Silver Wings Ranch | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Ellensburg |
| Simon Horsemanship | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Auburn |
| Sky River Equestrian Center | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Sultan |
| Smokey Wood Farm | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Redmond |
| Son Rise Ranch | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Vancouver |
| Sorensen Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Kingston |
| Soundview Hunter Jumpers | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Stanwood |
| Spokane Trail Rides | Boarding Stable, Riding Lesson, Trail Rides, Horseback Riding | Washington, Spokane |
| Stacey Lucko Dressage | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Fall City |
| Starfire Farm | Boarding Stable, Riding Lesson, Horseback Riding | Washington, Lakewood |
| Stella’s Chance | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Brush Prairie |
| Stokes Performance Horses | Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Sultan |
| Strides Therapeutic Horsemanship Center | Horse Camps, Equine Assisted Therapy, Riding Lesson, Horseback Riding | Washington, Pasco |
| Sue Hubbell Hunters and Jumpers | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Enumclaw |
| Sullivan Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Lake Tapps |
| Sun Dun Ranch | Boarding Stable, Coaches & Trainers, Riding Lesson, Guest Ranch, Horseback Riding | Washington, Rockford |
| Sundance Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Woodinville |
| Supercharge Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Spokane |
| Tashunka | Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson | Washington, Redmond |
| The Iron Horse Farm | Coaches & Trainers, Riding Lesson, Horseback Riding, Boarding Stable | Washington, Tacoma |
| The Red Horse Farm | Trail Rides, Horseback Riding, Horse Camps, Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Auburn |
| The Riding Place | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Port Orchard |
| The Spokane Equestrian Center | Horse Show, Breeder, Hay Provider, Boarding Stable, Coaches & Trainers, Horseback Riding, Riding Lesson | Washington, Spokane |
| The Stables at Magnolia Ridge | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Monroe |
| Thumbs Up Farm | Boarding Stable, Coaches & Trainers, Horse Show, Riding Lesson, Horseback Riding | Washington, Redmond |
| TL2 Farms | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Fall City |
| TNT Equestrian | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Coupeville |
| Topline Equestrian Centre | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Woodinville |
| Tri Cities Horse Trainer | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Richland |
| Trilogy Riding Centre | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Monroe |
| Triple Heart Ranch | Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Naches |
| True North Equestrian Centre | Riding Lesson, Boarding Stable, Coaches & Trainers | Washington, Snohomish |
| Warm Beach Camp & Conference Center | Riding Lesson, Horseback Riding, Horse Camps, Equine Assisted Therapy | Washington, Stanwood |
| Western Sky Horsemanship | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Redmond |
| White Rock Performance Horses | Boarding Stable, Coaches & Trainers, Riding Lesson, Trail Rides, Guest Ranch, Horseback Riding | Washington, Riverside |
| Whitethorn Farm | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Bainbridge Island |
| Whitt Show Horses | Boarding Stable, Coaches & Trainers, Riding Lesson | Washington, Olympia |
| Wildwood Farm | Trail Rides, Horse Camps, Coaches & Trainers, Riding Lesson | Washington, Oak Harbor |
| Winsum Acres | Equine Massage Therapist, Boarding Stable, Coaches & Trainers, Riding Lesson, Myofascial release | Washington, Kennewick |
| Woodbrook Stables and Events Center | Boarding Stable, Riding Lesson | Washington, Lakewood |
| Woodside Stables | Boarding Stable, Coaches & Trainers, Riding Lesson, Horseback Riding | Washington, Kingston |
