Devils Chasm (Mount Rainier National Park)

An interesting fault-crack chasm in Mt. Rainier National Park just south of Iron Mountain, a shorter satellite peak of Mt. Rainier. While it's a cool chasm with 100ft high walls in places, it has a very high pay-to-play ratio with a 4-5mi hike coming and going. The chasm was dry in early September 2021, but clearly experiences good flow earlier in the season per the lack of vegetation within the canyon.

From Longmire, hike the Wonderland Trail for 4.3mi to a bridge crossing Devils Dream Creek just downstream of the chasm. This is a checkpoint for the flow (if any). Continue hiking up the Wonderland another 0.4mi to just before the Devil's Dream trailside camp where a user trail drops down to the north into the drainage. Total distance is 4.7mi and 2500' elevation gain.

Head downstream wherever is easiest and the creek soon slots up. Continue downstream until you reach the bridge on the Wonderland Trail. It may be easier to exit DCR just after the canyon opens per logs in the creek.

Hike back out the way you came.