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Mammoth Rock

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L to R R to L Alpha
Boromir S 
Bridge of Sighs S 
Peregrine/Raptors nest T 
Proboscis S 

Mammoth Rock  Rock Climbing 

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Location: 37.88029, -121.98765 View Map  Incorrect?
Page Views: 4,115
Administrators: Aron Quiter, M. Morley, Adam Stackhouse, Salamanizer suchoski, Justin Johnsen, Vicki Schwantes, Kristine Hoffman (sitewide)
Submitted By: Stas Yurkevich on Sep 23, 2015

72° | 48°

75° | 50°

81° | 51°

84° | 55°

88° | 56°

92° | 59°
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Falcon Nesting Closure at Castle Rock MORE INFO >>>


The biggest rock at the bottom of the canyon. This rock has high foot traffic from both day hikers and stoners alike so don't leave stuff laying around on top.

Getting There 

First big rock formation on trail to Miller Pillar and Flintstone.

Climbing Season

Weather station 2.6 miles from here

4 Total Climbing Routes

['4 Stars',1],['3 Stars',2],['2 Stars',1],['1 Star',0],['Bomb',0]

Classic Climbing Routes in Mammoth Rock

Mountain Project's determination of the classic, most popular, highest rated climbing routes for Mammoth Rock :
Bridge of Sighs   5.10c 6b 20 VII 20 E2 5b R     Sport, 2 pitches   
Proboscis   5.10c 6b 20 VII 20 E2 5b PG13     Sport, 2 pitches   
Boromir   5.11a 6c 22 VII+ 22 E3 5c     Sport, 1 pitch, 90'   
Browse More Rock Climbing Classics in Mammoth Rock

Featured Route For Mammoth Rock
Rock Climbing Photo: Sean Burke on the FA of "Boromir"

Boromir 5.11a 6c 22 VII+ 22 E3 5c  California : San Francisco Bay Area : ... : Mammoth Rock
"Boromir" is 30' right of "Bridge of Sighs" and ascends a steep face with a thin diagonal crack. Technical face climbing with three cruxes, characterized by thin, precise foot-work yet also by dynamic, technical movement in spots....[more]   Browse More Classics in California

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