If you visit Colorado Springs, Colorado. Make sure you drive to manitou Springs, so you can hike up the incline. The trail is steep and ascends the east slope of Rocky Mountain. It's considered a strenuous. The Incline is known as the "holy grail of cardio" and has more stairs than the Empire State Building. It's considered an extreme trail and attracts runners, military members, Olympic athletes, and hiking enthusiasts from around the world.