California · Rock climbing · Thousand Oaks

Upper Irish Boulders

Upper Irish Boulders in California has 22 bouldering routes spanning 10 difficulty grades.

22 routes
V0 – V7
Bouldering

Best time to visit Upper Irish Boulders

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.

  1. Jan

    68° / 45°

    6 wet

  2. Feb

    68° / 46°

    6 wet

  3. Mar

    69° / 47°

    5 wet

  4. Apr

    71° / 49°

    3 wet

  5. May

    72° / 53°

    2 wet

  6. Jun

    75° / 57°

    0 wet

  7. Jul

    78° / 60°

    0 wet

  8. Aug

    79° / 61°

    0 wet

  9. Sep

    80° / 59°

    1 wet

  10. Oct

    76° / 54°

    3 wet

  11. Nov

    73° / 49°

    4 wet

  12. Dec

    68° / 44°

    5 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Camarillo Ap, CA, 7 mi away at 77 ft. The station sits about 900 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Upper Irish Boulders is a climbing area in Vallecito Open Space, a regional agency-managed open space in California. It sits among a cluster of bouldering spots, with Lower Irish Boulders, Conejo Boulders and Mystery Science Theater all about 0.1 mile away. The weather station at Camarillo, about 7 miles away, records typical averages that make late spring through early fall the most comfortable time to visit. Typical highs run from about 72°F in May to 80°F in September, with almost no wet days from June through September. That station sits roughly 900 feet lower than the boulders, so temperatures up here run cooler. The Powerline Trail starts about 0.2 mile away, and the Index Finger Trail and Pepper Tree Vista Trail are each about 0.7 mile off. For an overnight stay, Circle X Ranch Group Campground is about 6.3 miles away.

Keep exploring — more climbs worth the drive