I've posted the site here before, but I thought I'd share the state-based pages. You can also narrow the state by activity, though we have mostly hiking stuff right now:

http://www.trailbehind.com/state/Minnesota/hiking/

http://www.trailbehind.com/state/Colorado/biking/

http://www.trailbehind.com/state/Texas/camping/

http://www.trailbehind.com/state/New%20York/climbing/