rattlesnakes

Isn't Too Cold For Snakes?
When I saw that a portion of a hiking trail near Golden, CO was closed because of rattlesnake activity my first thought was "Isn't it too cold for snakes?"
Rattlesnakes Popping Up All Over Western Colorado
The photo above shows a rattlesnake spotted earlier this week near Craig, Colorado. The photographer says this makes the sixth rattlesnake he's seen in the area in the last week. Is Western Colorado experiencing an increase in the rattlesnake population?