• Distance: 0.7 miles
  • Difficulty: Intermediate
  • Tread: Natural, 36-48” wide
  • Terrain: Rolling Hills
  • Current Status: Open


The Underground is an intermediate trail with access from Bullfrog Loop, Thrillium, or Gorges Curves. An immediate rock jump leading onto The Underground from Bullfrog Loop gives riders a preview of the many fun features and B-lines this trail has to offer. Expect short climbs and descents on this trail whose name pays respect to the area’s historical involvement in the Underground Railroad.