American Endurance Ride
Conference 
The U. S. Equestrian Team
Foundation 
US
Equestrian Federation
Federation
Equestrian Internationale 
Endurance Net 
Arabian Horse
Association 
ECTRA- the Eastern
Competitive Trail Ride Association 
SERA- Southeast
Endurance Riders Association 
Upper Midwest Endurance and
Competitive Trail Rides Association 
Old Dominion Endurance Rides
Tevis Cup 100 Mile Endurance
Ride 
Endurance Ride Association of
South Africa 
Endurance
GB
Scottish
Endurance Riding Club