Fairly easy trail, not much climbing. Some hazards are the technical parts of the trail trail being along a steep drop, beginners, of if your not sure of your abilities, walk your bikes here! I'd hate to see someone fall down this again. I'm not sure how the loop works, there are SEVERAL trails and dirt roads after the steep climb coming out of the valley. Lots of exploring possible here. I got lost and ended up at some youth camp and had to ask for directions. Very busy on weekends!
From Intersection of Broadway and Canyon in Boulder, go 3.4 miles north on Broadway to Lee Hill Road. Take Lee Hill Road to Old Stage Road and go 4 miles to Lefthand Canyon Road, go left 2 miles to County Road 94 to Jamestown, go 4.7 miles to the enterance for Ceran Saint Vrain, turn right into the trailhead parking lot. (Information provided by "Mountain Biking Denver and Boulder") <br />a Simpler way would be to go north(or west as the book says) on Highway 36, there will be a sign for Jamestown where you will take a left, continue untill you reach the Ceran Saint Vrain parking lot enterance on the right, don't drive to fast or you'll fly right past it as I have a few times:o)
http://www.singletracks.com/item.php?c=1&i=1192