West of Crested Butte, the 22 mile Dyke Trail loop combines dirt roads with singletrack down through a scenic aspen forest. Along this route, there are great views of Ruby and Purple mountains along with the Anthracite Range.
To reach the mountain biking trailhead from Crested Butte, follow Kebler Pass Road (CR12) west towards Keblar Pass. Just before the pass, veer right towards Lake Irwin. There is a parking area immediately on the left. Alternately, you could continue up the road towards the start of the trail for 2 more miles and park just before Lake Irwin on the left.
Ride up past Lake Irwin and the campground. Continue left around the campground heading up. At the first road on the left, veer left for about a half mile to the trailhead on the left.
This is where the fun begins as you will be rolling down through the aspen groves. There are a few short climbs along the way, and one stout climb in the middle. After about 5 miles, the trail does a final descend to the Horse Ranch Park access road. Turn left on the dirt road to get back to Keblar Pass Road. Turn left and head back up towards Keblar Pass and over to Crested Butte.
This is an exceptional fall mountain bike ride due to the changing aspen leaves. Its at its peak in the end of September.
For alittle more singletrack, there is a newer trail parallel to Keblar Pass Road coming up from Crested Butte called the Keblar Pass Wagon Trail. Eventually, this trail will hopefully connect up with the Dyke to bypass a large chunk of road riding.
Overall, Dyke Trail is the 20th most popular mountain bike trail of all 175 mountain biking rides in Colorado.