Approach time: 1-5 minutes
Season: Summer, Fall
Number of problems: 10
Type of rock: Volcanic
Overview
10-15 problems. Subway Cave is north of Mt Lassen and is well marked with a sign and a parking lot off of CA-89 [Access for Bouldering = Unknown]
Notable Bouldering Problems
Climber Beta on Lava Tubes
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Lava Tubes
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Lava Tubes
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Photo: Chris Summit Collection
| Rating |
# of Problems |
| V0 |
5 |
 |
| V1 |
4 |
|
| V2 |
3 |
|
| V3 |
2 |
|
| V4 |
1 |
|
| V5 |
1 |
|
| V6 |
1 |
|
| V7 |
0 |
|
| V8+ |
0 |
|
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