Proboscis
Mid-range climb among five routes at Mammoth Rock.
- 5.10c
- grade
- Sport Bolted
- style
Best time to visit Proboscis
Best months: October–June. 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
58° / 42°
10 wet
Feb
63° / 44°
10 wet
Mar
68° / 47°
8 wet
Apr
72° / 49°
5 wet
May
78° / 53°
3 wet
Jun
85° / 57°
1 wet
Jul
88° / 58°
0 wet
Aug
88° / 59°
0 wet
Sep
86° / 58°
1 wet
Oct
78° / 53°
3 wet
Nov
67° / 46°
6 wet
Dec
59° / 41°
9 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Concord Wwtp, CA, 8.4 mi away at 40 ft. The station sits about 500 ft lower than this place, so expect it a little cooler here. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
One of five routes catalogued at Mammoth Rock, this climb sits in the middle of the crag's range between 5.7 and 5.11a.
Photo of the crag
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