On my quest to complete all the major summits within the San Francisco Volcanic Field, I decided a cool like this day was a good one to do O'Leary. With no rest on the ascent up, I made the true summit in 1 hour 50 minutes. Ate a gourmet lunch with my butt plopped on the bench mark, and then went over to the lookout tower and chatted with the fire lookout before heading down. The aspens are green down by the Bonito Lava Flow, as are the ones up higher along the road and on the Darton Dome.