Jam Boulder
Entry-level problem at Jam Boulder, part of a 29-route collection.
- V0
- grade
- Bouldering Pads
- style
Is Jam Boulder open right now?
No closures listed
The National Park Service lists no closures for Yosemite National Park.
As of · Source: NPS · Yosemite National Park. Agencies don't list every closure — check before you go.
Best time to visit Jam Boulder
Best months: March–June and September–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
48° / 29°
9 wet
Feb
51° / 30°
9 wet
Mar
57° / 33°
10 wet
Apr
63° / 38°
8 wet
May
70° / 45°
6 wet
Jun
80° / 51°
3 wet
Jul
89° / 57°
1 wet
Aug
89° / 57°
1 wet
Sep
83° / 51°
2 wet
Oct
71° / 41°
3 wet
Nov
56° / 32°
6 wet
Dec
46° / 28°
8 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Yosemite Park Hq, CA, 2.2 mi away at 4,018 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
One of 29 climbs catalogued at Yosemite Valley Bouldering's Jam Boulder sector, spanning from V0 to V12.
Photo of the crag
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