Big Mountain Trail Run this April (4/21) looks like a series of fun courses, a 5K, 10K, or Half Marathon in Cheyenne Canyon, Colorado Springs. I have run in that area, it is gorgeous and hilly; my kind of running. The 1/2 seems to have 2000’+ vertical gain and it is 70% single track . Also the finish is down hill, which is always exciting. Those moving trees will get you every time. The 10K is 90% single track – very cool!