Camped a couple of days in the San Luis Valley. Look closely at that first pic. There's a prairie rattler underneath those weeds. I spotted him just before I stepped on him, which would have been the most exciting part of the day for me and him both. I was wishing I could have got a better pic. Later on, back at camp, I was setting up my bedroll and this rascal comes easing on in, just making himself at home, not concerned with me at all. I figured that wouldn't work out, so I kicked dirt at him and he eased on back out. They aren't real aggressive, and they don't bother me as long as I know where they're at, but I do not sleep directly on the ground in this area anymore since that one buzzed me awake that one morning.