I have been all over the local hills and never seen one until TODAY! I saw two and they were large, well not young ones. The first one I saw while approaching the cache http://coord.info/GC22GA6 at 10' I saw him on a rock. He never knew I was there and I was able to take a photo then I let it be and decided to go out the way I came. On the way up the next hill I walked up on another one that was on the jeep trail. It was amazing how it blend in with the red dirt. Thought about getting closer look but this one knew I was there and rattled and coiled. So I gave it a wide berth and went around it. when I got back above it on the jeep trail it was gone. So why today? It was overcast and cool but it has been getting warmer except to day was cool at noon with 83% humidity. That is what got on here to read about them on the forum. Great information! I did mostly everything right, but I should not have thrown the rock to scare the second one away, it just made it mad.