SF Rush, "The Challenge Run." What is it? "The Challenge covers a 4.9k obstacle course where participants must conquer hundreds of stairs, ramps, tire flips, back pedals, sprints, high steps through bungees, combine drills, and bust through padded gauntlets. The races finishes on the field of Levi’s Stadium." I have no clue why I agreed to sign up for this! I never work out and for some reason I thought eh, how bad can this be? Well it was pretty damn intense, in the description when they say "hundreds of stairs" I think they should have said thousands of stairs! In the end I'd do it all over again, here are some photos I somehow managed to take.