Canada
Atlantic Canada Trail Riding Association, Canadian Long Distance Riding Association, Endurance Riders Association of British Columbia, Endurance Riders of Alberta, Trail Riding Alberta Conference
United States
AERC Central Region, Gold Country Endurance Riders Club, Great Lakes Distance Riding Association, Nevada All-State Trail Riders, Ozark Country Endurance Riders, Pacific Northwest Endurance Rides, Quicksilver Endurance Riders, Inc., Redwood Empire Endurance Riders Club, Ride and Tie Association, South Eastern Distance Riding Association (SEDRA)
American Endurance Ride Conference
Official sanctioning body for equine endurance rides in the USA and Canada. Extensive and comprehensive information on endurance riding, upcoming and past events, point system, on-line rule book, and membership.