For all the years I've been trail riding, I've only come across a snake once, a few weeks ago. He was about 2 1/2' long and stretched out in the middle of the trail. I thought he was dead so I walked Bonnie over him then got off to throw him into the bushes thinking that another horse might spook.
I picked up a branch and when I tried to pick him up, I find out that he was very much alive. Fortunately he was nothing more then a black snake but it still startled me when he started slithering around on the trail. We have quite a few copperheads and some rattlers in our area but many more black snakes - which is a good thing.