Colorado is a big state with great trails all over. According to the US Forest Service web site, Blanca Peak is open... Blanca Peak Trail
Check this link for what I think you are looking for...
Traildamage.com - Trails List
. Scroll to the Colorado section.
If you are in the Denver area, I recommend you investigate Mile-Hi Jeep Club
. It's more like a dozen clubs in one with their individual "Patrols".