Thing to Do

Hike to Bumpass Hell

Lassen Volcanic National Park

Four young kids hiking on a trail backed by a large volcanic peak and rocky, tree-lined slopes.
Bumpass Hell Trail is popular with hikers of all ages.

Lassen Volcanic National Park

A line chart showing trail elevation over distance. The line rises jaggedly to an overlook and then drops quickly to a boardwalk.
Trail profile of Bumpass Hell Trail one-way.
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4 minutes, 5 seconds

Learn more about the trail into Lassen's largest and most popular hydrothermal area, Bumpass Hell.

Bumpass Hell Trail Spring Closure

The trail to reach Bumpass Hell is at a high elevation and receives significant snowpack. The Bumpass Hell Trail is closed throughout spring and often into early summer due to severe winter hazards. On average, it opens by Fourth of July weekend, however actual opening dates vary with each year's snowpack. View alternatives during closure below.

Previous Opening Dates

Year Date Opened April 1 Snow Depth*
2011 July 13 242" / 20.2'
2012 June 29 145" / 12.1'
2013 June 25 140" / 11.7'
2014 June 11 122" / 10.2'
2015 June 7 91" / 7.6'
2016 July 9 199" / 16.6'
2017 August 22 243" / 20.3'
2018** Closed 131" / 11'
2019** September 13 238" / 19.8'
2020 July 2 119" / 10'
2021 June 16 114.5" / 9.5'
2022 July 1 96" / 8'
2023 August 4 217"/ 18.0'

*Snow depth manually recorded at Lake Helen (8,200' elevation) provides an annual comparison of snow depth near the end of the winter season.
**Closure and delayed opening for rehabilitation project.

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:

  • Stop by Sulphur Works hydrothermal area, the most easily accessed hydrothermal area in the park.
  • Take a day trip to the Warner Valley Area and enjoy an easy or moderate hike to one or more hydrothermal areas including (distances are round-trip): Boiling Springs Lake (3.0 mi), Devils Kitchen (4.4 mi), and Terminal Geyser (5.8 mi).
  • Access Bumpass Hell basin via the Cold Boiling Lake Trail (5.2 mi). Note that this is a longer and more challenging hike than the Bumpass Hell Trail. You can also expect snow on this trail through June or sometimes July. If the Kings Creek Picnic Area and trailhead is not yet open for the season due to snow, you may park in a pullout along the highway and walk in (be prepared for significant snowpack).

Last updated: May 19, 2024