On a MTB trail (a DORBA kept trail, used very frequently) two springs ago I saw THREE rattlesnakes on one ride. I don't do snakes. One was curled up on the path and I dang nearly careened into it (my husband was behind me). My husband and another biker prodded it off the path, it was rattling up a storm. The second was crossing the path and was all of two feet from me. The third was sleeping in the path. By that time, I was ready to call for a helicopter to come and get me. Ugh.