Rock hounding locations in Colorado?

[Xcape2xplore]

So I'm an earth science teacher in Colorado, and I'm looking for some new places to go in Colorado to collect new rock samples (mainly igneous and metamorphic rock). Places need to be legal areas and have good trails.

 

[05dakotatrac]

http://geosurvey.state.co.us/mapping/Pages/WhatisaGeologicMap.aspx

here ya go curse of having a wife that has a master degree in geography and ex's that study meterology and geology