The Thumb Sport Horse Association is a non-profit organization with a purpose, as stated in the bylaws, to:
1. Promote greater interest, activities, and education among those who enjoy the world of sport horses;
2. Promote classical, ethical training principles that provide a sound foundation for any of the sport horse disciplines;
3. Cultivate mutual respect, consideration, and understanding among members for all sport horse disciplines;
4 Encourage members to exchange information and ideas;
5 Cooperate with other related associations and groups to further good horsemanship and to promote fair and humane treatment of all equines.