more stats
3.1 miles
Distance
291 ft
Climb
-1,058 ft
Descent
03:42:04
Avg time
-768 ft
Altitude change
7,418 ft
Altitude min
8,391 ft
Altitude max
8,187 ft
Altitude start
7,418 ft
Altitude end
-4.7%
Grade
-31.5%
Grade max
20.3%
Grade min
1 mile
Distance climb
2 miles
Distance down
1,053 ft
Distance flat
03:42:04
Avg time

Bumpass Hell Details

  • Activities
    • Hike
    • Trail Running
  • Riding Area
    Lassen Volcanic National Park
    Redding, California
  • Difficulty Rating
  • Local Popularity
    100 in Hiking [+]
    • 50 in Trail Running
  • Global Ranking
    #2423 in Hiking [+]
    • #111226 in Trail Running
  • Hiking SAC Scale
    T1 Hiking
  • Trail Type
    Singletrack
  • Direction
    Both Directions
  • Climb Difficulty
    Green
  • Physical Rating
    Moderate
  • Trail Visibility
    Always easy to follow
  • Family Friendly
    Yes

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

Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 2 rides
  • 3 miles average
6 Months
  • 14 rides
  • 4 miles avg distance
All
  • 38 rides
  •  
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Bumpass Hell Trail Reports

Status:
on Sep 12, 2025
Ideal
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      Directions to bumpass-hell trailhead (40.466110, -121.514080)

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      Articles

      The Best Road Trips to Take This Summer Across the U.S.
      Jul 3, 2025 from outsideonline.com
      An expert roadtripper's guide to the best American road trips based on their proximity to adventure—from fly fishing holes to flowy singletrack...

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      • By toddTF Pro Trailforks & contributors
      • #243499 - 1,538 views

      Frequently Asked Questions

      ▼ Where is Bumpass Hell located?
      Bumpass Hell is located in Lassen Volcanic National Park, Redding, California, United States. It is part of the Lassen Volcanic National Park trail network. The trailhead is located at coordinates 40.46611, -121.51408.
      ▼ How hard is Bumpass Hell?
      Bumpass Hell is rated as Blue difficulty. The physical rating is Moderate. The average grade is 4.7%. The climb difficulty is rated Green.
      ▼ What is the elevation gain for Bumpass Hell?
      Bumpass Hell has 291 ft of elevation gain. The trail has 1,058 ft of elevation descent. The elevation ranges from 7,418 ft to 8,391 ft.
      ▼ Is Bumpass Hell a point to point trail?
      Bumpass Hell is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
      ▼ How long is Bumpass Hell?
      Bumpass Hell is 3.1 miles long. The trail type is singletrack.
      ▼ Are dogs allowed on Bumpass Hell?
      There is no information about dogs being allowed on Bumpass Hell. Check with local trail managers or the trail page for the latest access rules.
      ▼ How do I access Bumpass Hell? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Bumpass Hell are: View all parking locations in the area.
      ▼ How long does it take to hike Bumpass Hell?
      Based on recorded activities, it takes an average of 2 hours 40 minutes to hike Bumpass Hell. The trail is 3.1 miles long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Bumpass Hell?
      Bumpass Hell is a very popular trail. There have been 238 recorded activities on this trail. The trail has received 238 check-ins. View recent activity on this trail.

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