I have 1400 acres of state trails within walking distance from the barn that I board. Now the street that many people ride down to the trail on is not busy by any means, but it is a long country road and motorcycles and cars tend to zoom by. I know that I eventually would like to spend many hours riding the trails with her, but how do you go about introducing trail riding to a horse? She's fairly desensitized to cars coming and going from the yard, but I haven't really walked her on a road, and never have in the woods. She's fairly good when being led unfamiliar places, although she tends to change her way of breathing, smell the ground, and quietly snort. She's not a prancy, boltish type of horse. How should I go about the desensitization process?