California · Rock climbing · Chatsworth

Pump Rock

Pump Rock in California has 6 bouldering routes across 3 difficulty grades.

Photo: jxson, CC BY 2.0 (via Flickr)

6 routes

V0 – V1

Bouldering

Best time to visit Pump Rock

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
67° / 47°
6 wet
Feb
68° / 47°
7 wet
Mar
71° / 49°
5 wet
Apr
75° / 52°
3 wet
May
78° / 56°
1 wet
Jun
84° / 60°
1 wet
Jul
90° / 64°
0 wet
Aug
92° / 64°
0 wet
Sep
89° / 62°
1 wet
Oct
82° / 56°
2 wet
Nov
74° / 50°
4 wet
Dec
67° / 46°
6 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Northridge Cal State, CA, 4.9 mi away at 904 ft. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Pump Rock is a bouldering area in Stoney Point Park, a city-managed park in California. It sits among a cluster of other climbing spots, with Jam Rock, Boulder 1 and Slant Rock all within about a tenth of a mile. The boulders here are the focus. Six routes are listed, all bouldering, and most sit around the V0 and V1 levels on the V scale, with the Pump Traverse at V1 being the highest of them. North Face Mantle and Slump Arete are two of the V0 routes. The YDS grade is 5.8- for one of the boulders, so climbers can expect to work within the 5.8 to V1 range across the area. Spring and fall are the most comfortable times to visit. At a nearby weather station in Northridge, typical averages run to highs around 75°F in April and 82°F in October, with summer highs climbing into the low 90s. The station sits at 904 feet, and the park's elevation is similar, so expect the same general pattern across the climbing area.