Pre-erosive Force
The hardest climb catalogued at Junior Area.
- 5.12a
- grade
- Sport Bolted
- style
Is Pre-erosive Force open right now?
Alert in the area
The Forest Service lists 4 alerts for Inyo National Forest.
Stage 1 Fire Restrictions in Effect
Agency alert covering Inyo National Forest · Order 05-04-50-26-23 · USFS · Inyo National Forest
Help Halt Golden Mussel Invasion
Agency alert covering Inyo National Forest · USFS · Inyo National Forest
Ansel Adams and John Muir Wilderness Campfire Restrictions
Agency alert covering Inyo National Forest · Order 05-04-50-25-04 · USFS · Inyo National Forest
Golden Trout and Hoover Wilderness Campfire Restrictions
Agency alert covering Inyo National Forest · Order 05-04-50-25-05 · USFS · Inyo National Forest
As of · Source: USFS · Inyo National Forest. Agencies don't list every closure — check before you go.
Best time to visit Pre-erosive Force
Best months: April–May and October. 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
56° / 24°
4 wet
Feb
59° / 26°
4 wet
Mar
67° / 31°
3 wet
Apr
74° / 37°
2 wet
May
83° / 44°
2 wet
Jun
94° / 51°
1 wet
Jul
100° / 57°
1 wet
Aug
98° / 54°
1 wet
Sep
90° / 47°
1 wet
Oct
78° / 37°
1 wet
Nov
64° / 27°
2 wet
Dec
55° / 22°
3 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Bishop Ap, CA, 16 mi away at 4,102 ft. The station sits about 1,600 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
This route represents the upper end of the grade range at Junior Area, where five climbs have been catalogued between 5.10c and 5.12a.
Photo of the crag

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