Bumpass Hell

Bumpass Hell effort & difficulty

GoatBeam summarizes Bumpass Hell (Lassen Volcanic National Park, California) effort from verified route geometry and DEM elevation — planning context, not a fitness or safety rating.

Trip distance is about 3.5 mi with roughly +1089 ft of elevation gain on this out-and-back.

Difficulty from verified grades

Along-trail grade distribution (by distance): 34% gentle, 31% moderate, 20% steep. Bands describe slope magnitude from the DEM profile, not trail difficulty labels from guidebooks.

Average climbing grade on ascent samples is about 8.2%.

The steepest rolling uphill grade in the verified profile reaches about 14.8%.

The steepest sustained climb spans about 0.2 mi near 1.9 mi into the trip (mean ~12.3%, peak ~14.8%).

Verified DEM grades show climbing concentrated later in the trip.

Elevation & elevation gain

Bumpass Hell elevation gain is about +1089 ft on the published outing.

The verified elevation range runs from roughly 7454 ft to 8266 ft.

Elevation loss along the trip is about 1089 ft.

Elevation profile

The GoatBeam elevation profile charts distance against DEM elevation for Bumpass Hell, so you can see where gain accumulates before you hike.

Use the profile together with the grade callouts above to locate the steepest verified section and where climbing concentrates.

3D map & trail map

GoatBeam’s interactive 3D map and trail map for Bumpass Hell show the verified corridor on terrain — spin and beam tools help you read the landscape before you go.

Where Beam Points exist, you can jump into real trail viewpoints; gaps stay visible rather than invented.