Unknown Boulder (near parking lot and river)
Unknown Boulder in California has 6 bouldering routes with 5 difficulty grades.
- 6 routes
- V0-1 – V4-5
- Bouldering
Is Unknown Boulder (near parking lot and river) open right now?
Alert in the area
The Forest Service lists 2 alerts for Tahoe National Forest.
Stage 1 Fire Restrictions
Agency alert covering Tahoe National Forest · Order 17-26-25 · USFS · Tahoe National Forest
Camping and Campfire Restrictions-Truckee and Sierraville Districts
Agency alert covering Tahoe National Forest · Order 17-25-05 · USFS · Tahoe National Forest
As of · Source: USFS · Tahoe National Forest. Agencies don't list every closure — check before you go.
Best time to visit Unknown Boulder (near parking lot and river)
Best months: May–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
44° / 25°
Feb
46° / 26°
Mar
51° / 27°
Apr
56° / 30°
May
64° / 37°
Jun
75° / 43°
Jul
82° / 48°
Aug
82° / 47°
Sep
76° / 44°
Oct
65° / 37°
Nov
51° / 30°
Dec
43° / 25°
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Lake Spaulding, CA, 0.9 mi away at 5,156 ft. The station sits about 700 ft higher than this place, so expect it a little warmer here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Unknown Boulder is a climbing area in the Yuba River Ranger District of Tahoe National Forest in California, about a mile from the Sierra Discovery Trail and the Spaulding Lake Trail. It sits near a parking lot and the river, and the closest climbing neighbor is Convocation Boulder, about 0.2 miles away. Summer is the most comfortable time to visit. Typical averages from the nearby Lake Spaulding weather station, at a similar elevation, run to highs around 82°F in July and August with lows in the upper 40s, while winter highs sit in the low to mid 40s. Camo Crag is about half a mile away, and the Sierra Discovery Trail is under a mile off. For an overnight stay, Rucker Lake campground is about 2.7 miles away, and the North Fork (CA) campground is about 3.3 miles away.
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