From Highway 285: At Grant, take the exit for Guanella Pass Road. The road will start as paved but quickly becomes an easy 2wd dirt road. Continue on this road for 5 miles and you will spot a trailhead on the right side of the road just before the Burning Bear Campground. Park here.
From I-70: From Georgetown, follow the signs directing you to Guanella Pass. Once on Guanella Pass Road, drive for 12 miles until you reach the top of the pass. Continue down the other side (south) of the pass for approximately seven miles until you reach the Burning Bear Campground. The trailhead is just beyond the campground on your left.