http://www.traildamage.com/google_color ... 7247100000
I really like this site for the info and variety of trails they have. StayTheTrail did not have as much and others where not even as good as the old pre-GPS jeep books I got.
This one seems pretty good for bigger bikes (650+) due to the volume of info. I highly recommend staying in the 1-2-3 rating for 'large-bike ok-skills types'. That said Ophir is a 2-3 and even Troy has said it was bit 'interesting' and narrow. Hurricane Pass is rated a 3 and I thought it was a tough way up (but up sure beats down on head sized rocks with a steep deadly drop). Don't just go by the ratings. I also skipped any with deep crossings or mud. Enough of that this year.
I was looking for gpx files for the Front Range and this site appears to be the best. I did change all of the trails to put the start/end of the waypoints and tracks out on the highways so I can hop from one to the next without having to operate the gps much while driving on the highways between Estes and Idaho Springs.
Hope you find this useful.
Colorado trail guide
Colorado trail guide
2015 Husky FE350S
2012 KTM 990
2012 KTM 990