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> Atomic Mushroom Boulder
Southwest Arete
V4 YDS 6B Font
Avg: 1 from 1
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Routes in Atomic Mushroom Boulder
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Atomic Mushroom V6 7A |
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Atomic Mushroom Direct V8-9 7B+ |
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Atomic Nucleus V5 6C |
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Atomic Punk V3 6A |
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Southwest Arete V4 6B |
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West Face Center V4 6B |
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West Face Left V0 4 |
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West Face Right V3 6A |
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| Type: | Boulder, 10 ft (3 m) |
| GPS: | 37.24075, -122.10555 |
| FA: | unknown |
| Page Views: | 42 total · 14/month |
| Shared By: | M J on Feb 27, 2026 |
| Admins: | Aron Quiter, Mike Morley, Adam Stackhouse, Salamanizer Ski, Justin Johnsen, Vicki Schwantes |
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Access Issue: RAIN, WET ROCK CLOSURES; The sandstone around Castle Rock is fragile and is very easily damaged when it is wet.
Details
WET ROCK: Holds rip off and climbs have been and will continue to be permanently damaged (like Donkey Dong and countless others) due to climbers not respecting this phenomenon. After a heavy storm the rock will remain wet, sometimes for several days. PLEASE DO NOT CLIMB AT CASTLE ROCK during or after rain.
Access Issue: Trails are closed from sunset to 6:00 am.
Details
Trails close at sunset. Give yourself enough time to be back at your vehicle (or campsite if you're staying at one) before dark, or the rangers will fine you.
Always visit the Castle Rock State Park website parks.ca.gov/?page_id=538 for fairly current official information.
Always visit the Castle Rock State Park website parks.ca.gov/?page_id=538 for fairly current official information.
Description
Sit start on a square chunk and move your left hand out to the lip on the left side of the arete. Move your way up using holds on the arete and to the right of it. The crux is a committing move (or couple moves) to the upper lip where the tree behind you is directly in the fall zone. Luckily, the lip is a huge jug.
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