Michigan Competitive Mounted Orienteering
members.aol.com
Sport, membership, and ride information.
National Association of Competitive Mounted Orienteering
nacmo.org
A non-profit organization offering information on the objectives of the sport, membership, ride calendar, ride results, chatroom, newsletters, and links.
TREC UK
trec-uk.com
Information about the sport of TREC, which includes mounted orienteering, and discussion forum.
Mercia TREC Club
chd-solutions.co.uk
English club that practices TREC, a competition that is a combination of orienteering on horseback, and maintaining set speeds (normally trot or walk).