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The Fiery Furnace area isn't a clearly-defined hike down a marked trail but rather, a labyrinth of soaring rock fins, spires, and arches that intrepid hikers can scramble through.
Hiking through this area of Arches National Park requires climbing up and over the rock fins, squeezing through narrow passages, traversing narrow rock ledges, and more.
The Fiery Furnace area "spans a roughly 2-mile route between towering, maze-like canyon walls," according to [NationalParks.org](https://www.nationalparks.org/connect/blog/can-you-handle-fiery-furnace-hike-arches-national-park). If you choose to head into the Fiery Furnace, you must be prepared to be 100% self-sufficient and be able to navigate without any trail markers whatsoever.
"Unlike many hiking trails, which feature steep climbs and high elevations, Fiery Furnace tests your ability to keep your bearings and find solid footing in a disorienting place," says NationalParks.org.
"There are no trail signs or markers, and GPS units have a tendency to fail among the lofty sandstone walls.
Navigating the difficult passages takes stamina, agility, and acute attention to detail." For advanced hikers and climbers, the unmarked and totally off-trail nature of hiking in the Fiery Furnace is precisely the allure.
You can't find this type of raw exploration anywhere except the unique rock formations provided by these desert landscapes. If you choose to head into the Fiery Furnace, you'll have to acquire a backcountry permit from the Visitors Center.
Alternatively, if you're not quite up for scrambling through a forbidding rock landscape on your own, you can choose to instead join a ranger-led guided tour for a cost of $10 per person.