The Fiery Furnace, in beautiful Arches National Park, offers a labyrinth of narrow passageways and abrupt dead-ends among a series of sandstone fins. Though it does not encompass a very large area, it is easy to become disoriented or lost. For this reason, and to protect native plants and soils, visitors must join a guided hike, or obtain a special permit, in order to enter the Fiery Furnace. Ranger-guided hikes are offered into the Fiery Furnace daily, spring through fall. These popular 2 1/2 hour hikes are moderately strenuous, requiring the use of hands and feet to scramble up and through narrow cracks and along steep ledges above drop offs. Click here to watch a video of the Fiery Furnace Loop tour visit.