Caribou Classic aka Sufferfest - 40 miles
My first organized group ride in a very long time. I joined the Boulder Mountain Bike Alliance just to get a chance to ride the trails on the private Caribou Ranch lands. And it was well worth while! Colorado blue sky day, a touch of frost on the ground at registration at 7am, lots of really fun and happy people, a very challenging route with loads of climbing. 6 hours to complete the full monty, which included the slippery roots of the Little Raven Trail, the technical, round boulders of the South Saint Vrain Trail, and the body rattling rocks of the Sourdough Trail.