The Unnatural Act Cave
Unnatural Act Cave, The in California has 9 bouldering routes across 6 grades.
Photo: Joe Passe, CC BY-SA 2.0 (via Flickr)- 9 routes
- V0 – V6
- Bouldering
Best time to visit The Unnatural Act Cave
Best months: Year-round. 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° / 47°
11 wet
Feb
60° / 48°
11 wet
Mar
62° / 49°
11 wet
Apr
63° / 50°
7 wet
May
64° / 51°
4 wet
Jun
67° / 53°
2 wet
Jul
66° / 54°
1 wet
Aug
68° / 55°
1 wet
Sep
70° / 56°
1 wet
Oct
70° / 54°
4 wet
Nov
64° / 51°
8 wet
Dec
58° / 47°
11 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at San Francisco Dwtn, CA, 2.2 mi away at 150 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
The Unnatural Act Cave is a bouldering area in Glen Canyon Park in San Francisco, California, on city land. It sits within a cluster of climbing spots, with Main Cliff Band and Glen Canyon both about 0.1 mile away, and Beaver Street Wall about 1.6 miles off. The area's name is a play on the title of a book, and its routes are all bouldering problems rather than traditional rock climbing. Summer and early fall are the driest stretch, with typical highs around 66 to 70°F and only one or two wet days a month from July through September, based on averages from a nearby weather station in San Francisco. Winter brings typical highs in the upper 50s and about 11 wet days a month from December through February. The cave's bouldering runs the full range of the V scale, from V0 on Splitter Crack to V6 on an unnamed linkup. The Natural Act and Unnatural Pocket are also in the mix, with grades of V1+ and V5.
Keep exploring — more climbs worth the drive
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