All trail users are responsible for watching and listening for others. Traveling on the right side of the trail removes indecision about the proper side on which to pass. Always ask for and get permission if you must pass on the left. Slow down significantly and use caution at curves and junctions. Surprises are not safe - it doesn't matter what you are riding.
Yield to a horse and rider. Be sure the horse has seen and heard you; give the horse adequate room to pass.
A hiker should call out a friendly hello and request that s/he would like to pass. The horse rider may need to pull over, to provide the safest position to the hiker. If the rider has his horse under control, proceed; if not, allow the rider to move his horse beyond you.
Motorized recreation vehicles can usually be heard coming, and the horse rider may be well out of the way. If not, please shut off the motor and allow the rider to get a distance beyond you before starting up. Turn off engines any time a horse appears nervous. Ask the rider what you can do to help.
Bicycles are quiet and not heard by horse or rider. Speak out so the horse hears a human voice. It may be necessary for the bicyclist to remain stopped, allowing the horse and rider the opportunity to get out of the way, before proceeding.
Promote a positive relationship with a friendly greeting. Calm, pleasant conversations reassure the animal that all is ok.
A horse rider may choose to move his horse on without stopping. This is not a lack of courtesy but a decision on how best to control the animal. Or the rider may request that you continue past. Ask the rider to advise you.
Equestrian Trail Etiquette Brochure (PDF)