Take Highway 287 to Highway 14 West (Ted's Place), then travel 6.3 miles on Hwy 14 West. Park in the large pull-out on the right. The boulder pictured below is located on the opposite bank, ~100ft upstream. The approach time is less than 1 minute but includes a river crossing.
N 40 41.579
W 105 15.610
1. (V4/5) Start sitting on the ground and follow steep arete. video evidence
2. (V5/6) Start sitting on the rock in the cave and traverse right to join #1. video evidence
3. (V9/10) Start sitting on the ground in the cave and join #2. video evidence
Update: I was fortune to witness another ascent of #3. That ascensionist suggested V8/9 if a "cheater" sweater is used for the first move (^_~).