AllOtsego People Coop group to take on biking challenge By GREG KLEIN • Special to www.AllOTSEGO.com A group of Otsego County residents have been training for the ride of their lives in the Leadville 100 MTB. The annual “race across the sky” in the Rocky Mountains near Leadville, Colorado, is considered one of the most grueling endurance races in the world. Whether people do the ultramarathon or the mountain bike race, the competitors are embarking on a challenge that breaks…