Courtesy 101
CountryLady,
As an avid mountain biker and trail runner, I yield the trail to horses each and everytime I encounter them. As a member of my community, I yield the trail with courtesy and friendliness for the safety and enjoyment of the rider and horse. I approach the horses slowly, calling out to let them know I'm there and stopping until the riders let me how they want to proceed. Sometimes, they move off the trail while I pass and other times, I move off the trail and wait until they pass. In some cases, I've waited 5 - 10 minutes while the riders get their skittish animals under control and move off. I really don't mind. I happen to like horses.
So, as a courtesy to all the users of public, multi-use trails, please reciprocate the courtesy extended to you and take a few minutes out of your ride to kick your horses sh$t off the trail.