trail riding(n = noun.act) - riding along a roughly blazed path;
is a kind of horseback riding, riding

cattle trail, chisholm trail, condensation trail, cross-country riding, deer trail, endurance riding, horseback riding, iditarod trail, iditarod trail dog sled race, indian trail, little red riding hood, mountain trail, pack riding, paper trail, riding, riding bitt, riding boot, riding breeches, riding crop, riding habit, riding horse, riding lamp, riding light, riding master, riding mower, riding school, santa fe trail, ski trail, trail, trail bike, trail boss, trail head, trail rope, vapor trail