Start: Bumpass Hell parking area
Rehabilitation efforts are completed on the 1.5-mile trail between Bumpass Hell parking area and Bumpass Hell basin. The resulting trail is wider, smoother, and better designed to withstand erosion.
Hikers will see continuing Bumpass Hell Trail and Boardwalk Rehabilitation Project efforts along the trail and within the basin. This includes restoration of an alternative 0.2-mile basin access trail and overlook enhancement. The second basin trail will remain closed until construction is complete and access to overlooks may be limited.
snowpackiew alternatives during closure below.
Previous Opening Dates
Alternatives to Bumpass Hell Trail
Consider one of these alternatives if Bumpass Hell Trail is closed, too crowded, or you are just looking for something new:
The Largest Hydrothermal Area in the Park
Bumpass Hell is the largest hydrothermal area in the park and marks the principal area of upflow of steam and discharge from the Lassen hydrothermal system. The temperature of high-velocity steam jetting from Big Boiler, the largest fumarole in the park, has been measured as high as 322°F (161°C), making it one of the hottest fumaroles in the world. The steam heated waters are typically acidic and are not safe, even for bathing. Learn more about hydrothermal features in Lassen in a U.S. Geological Survey publication, "Hot Water" in Lassen Volcanic National Park.
Last updated: July 2, 2020