Ive seen quite a few snakes laying on trails while mountain biking. I usually stop and move them out of the way with a small branch if they wont move on their own. They are usually 1-2ft long, maybe 0.5 inch wide, easy to move. I have to remind myself to share the fire road. Same with the coyotes but those guys can get stroppy at times, you have to be assertive with the coyotes and they will move. Be kind with the snakes. Oh and ladies, trust me I see coyotes every month, dont try to fuck one. You will have better luck with a wolf Coyotes are mean.