Have a few days off and want to ride in southern colorado. I have maybe 15 days total experience riding moderately challenging off-road terrain in the last few years, and alot of time on dirt forest roads. I also lack aggressive tires (ie, irc gp 110 front and avon gripster rear). looking for some fun passes and high country with a bit of challenge, but i dont want to get over-terrained to the point that the ride sucks. any recommendations are welcome.