The Thumb
The hardest climb catalogued at Main Wall.
- 5.12c
- grade
- Sport Bolted
- style
Best time to visit The Thumb
Best months: February–June and October–November. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.
Jan
60° / 31°
7 wet
Feb
61° / 32°
8 wet
Mar
65° / 35°
8 wet
Apr
69° / 38°
5 wet
May
75° / 43°
3 wet
Jun
85° / 46°
1 wet
Jul
92° / 53°
1 wet
Aug
93° / 54°
1 wet
Sep
89° / 49°
2 wet
Oct
79° / 40°
3 wet
Nov
68° / 34°
5 wet
Dec
60° / 30°
7 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Henshaw Dam, CA, 14.3 mi away at 2,700 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
This route represents the upper limit of difficulty among the 63 climbs catalogued at Main Wall, pushing beyond the crag's typical range that spans 5.4 to 5.12c.
Keep exploring — more climbs worth the drive
Photo: Waifer X, CC BY 2.0 (via Flickr)Upper Tier
~19 min drive
Upper Tier is a California climbing crag with 14 routes across 6 grades.
Photo: Waifer X, CC BY 2.0 (via Flickr)Lower Tier
~19 min drive
Lower Tier in California has 9 traditional climbing routes across 5 grades.
Photo: Waifer X, CC BY 2.0 (via Flickr)Stonewall Peak
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California granite crag with varied climbing for multiple skill levels.
Caryn Ct. Bouldering
~4 min drive
Caryn Ct. Bouldering in California has 8 bouldering routes across 6 grades.
Mt. Gower
~5 min drive
Mt. Gower in California has 13 climbing routes across 12 grades, featuring bouldering pads, mixed, sport, and trad styles.
Middle Area
~5 min drive
Middle Area in California has 9 climbing routes across 8 grades, offering bouldering pads, mixed, and sport styles.
Quiet Oaks Boulders
~5 min drive
Quiet Oaks Boulders in California offers 5 bouldering routes across 5 difficulty grades.
Tan Man Tower
~6 min drive
Tan Man Tower in California has 5 sport climbing routes on 4 difficulty grades.
The Summit
~6 min drive
Summit, The in California has 9 climbing routes across 6 difficulty grades.
Left Wall
~7 min drive
Left Wall in California has 19 routes from 5.10a to 5.12d, offering sport and trad climbing.
