California · Rock climbing · Chatsworth

Jam Rock

Jam Rock in California has 6 bouldering routes ranging from moderate to hard difficulty.

Jam RockPhoto: jxson, CC BY 2.0 (via Flickr)
6 routes
V2 – V9+
Bouldering

Best time to visit Jam 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.

  1. Jan

    67° / 47°

    6 wet

  2. Feb

    68° / 47°

    7 wet

  3. Mar

    71° / 49°

    5 wet

  4. Apr

    75° / 52°

    3 wet

  5. May

    78° / 56°

    1 wet

  6. Jun

    84° / 60°

    1 wet

  7. Jul

    90° / 64°

    0 wet

  8. Aug

    92° / 64°

    0 wet

  9. Sep

    89° / 62°

    1 wet

  10. Oct

    82° / 56°

    2 wet

  11. Nov

    74° / 50°

    4 wet

  12. 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.

Jam Rock is a bouldering area in Stoney Point Park, a city-managed park in California. It sits among a cluster of climbing spots, with Pump Rock, Slant Rock and Jesus Wall all about 0.1 mile away. The park's city ownership makes it an easy stop for climbers already exploring the surrounding area. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station show April highs around 75°F and October highs around 82°F, while July and August average in the low 90s. The area has six bouldering routes, all rated on the V scale. Arete is the easiest at V2, and Crank Yanker is the hardest at V9+. Aftershock is V5, and Crankin Queenie is V7-8.

Routes (6)

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