Its not like I see a snake around every bend of the trail, but I've seen quite a few this summer. I'm thinking this due to the abundance of rain this year, providing lots of tasty morsels for vipes to eat.
Update: Bigrigmig made a comment that the snake appears to be a Black-tailed Rattlesnake. It sounds like a good call to me. Now I know. Thanks Bigrigmig!
Here's a short clip of the Rattlesnake: