That's what the sign says at the bottom of the Manitou Incline Trail, an infamous hardcore fitness attraction off Ruxton Avenue in Manitou Springs, just a few miles west of Colorado Springs. The Incline Trail consists of approximately 2,000 steps and 2,000 feet of elevation gain in just over a mile. Most of the "trail" is composed of little more than railroad ties rebarred into mountain. Its steepest section is a 68 percent grade. I highly recommend it.