The fourth and final qualifying round, held in Denver, Colorado, features the highest elevation to date! Competitors are challenged with six obstacles, four of which are new this year, as well as the threat of thin air. Some of the best skiiers and rock climbers reside in Denver, making this a competitive region. In the first half of Denvers tryouts, we see 2 female athletes try their luck--including one Olympic gymnast! Also, don't miss veteran Paul Kasemir's stunning performance on the course.