Denver's mountain biking is big, fast and tough -- perfect for riders who like to be challenged on the bike. Many of the nearby trails share a common theme: tough, steep climbs, fast singletrack and sections of tricky technical riding. White Ranch and Apex are neighboring trails (that can be connected) and have scrappy, big hills to climb and a few wildly technical sections to master. Mount Falcon is legendary for its steep climbs, while Lair O' the Bear offers quick loops without super difficult terrain. Centennial Cone is a 16 mile loop that has great gradual climbing and speedy singletrack along with incredible views.