ElevationAscent: 369' 112 m
Descent: -377' -115 m
High: 2,458' 749 m
Low: 2,081' 634 m
GradeAvg Grade: 6% (3°)
Max Grade: 14% (8°)
Popular hikes nearby
Mount St. Helens Winter Route: Worm Flows
10.5 mi 17.0 km • Loop • 5,600 ft Ascent 1706.76 m Ascent
Mount St. Helens Summer Climbing Route: Monitor Ridge
8.8 mi 14.1 km • Out and Back • 4,489 ft Ascent 1368.15 m Ascent
June Lake Loop
4.6 mi 7.4 km • Loop • 1,024 ft Ascent 312.01 m Ascent
Lava Canyon Loop
1.2 mi 1.9 km • Out and Back • 257 ft Ascent 78.27 m Ascent
12.4 mi 19.9 km • Point to Point • 2,658 ft Ascent 810.28 m Ascent
Trapper Creek Out-and-Back
7.6 mi 12.3 km • Loop • 1,704 ft Ascent 519.52 m Ascent
“Underground tunnel through old lava tubes.”— Ben Wagner
Need to Know
Note that while leashed dogs are allowed on the surface trails around the cave, they are NOT permitted inside the cave itself. It is not safe for them (the floor of the cave can be sharp and may cut paws) or considerate for other cave users. Dogs may also be carriers of white-nose syndrome, a fungus-borne disease that can be fatal to bats.
The upper tunnel requires some light scrambling: As you navigate the upper tunnel, expect to climb over rocks that have fallen into the pathway. Once you reach the end of the upper tunnel, you'll see a ladder leading back to the surface.
Following the path will take you back to the parking lot through a forested trail. The darkness of the cave, in contrast to the vitality of the forest excites the senses, and will make any visitor appreciate the various flora and fauna along the path.