California · Rock climbing · Big Bear City

Greenhouse and Alpine Rocks

Greenhouse and Alpine Rocks is a California climbing crag with 4 routes.

4 routes
5.5 – 5.10c
Sport · Trad

Is Greenhouse and Alpine Rocks open right now?

Closure in the area

There's a closure order in Mountaintop Ranger District. It doesn't name Greenhouse and Alpine Rocks, so check the source for the area it covers.

As of · Source: USFS · Mountaintop Ranger District. Agencies don't list every closure — check before you go.

Best time to visit Greenhouse and Alpine Rocks

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.

  1. Jan

    46° / 24°

    6 wet

  2. Feb

    46° / 24°

    6 wet

  3. Mar

    51° / 27°

    6 wet

  4. Apr

    57° / 31°

    4 wet

  5. May

    66° / 37°

    2 wet

  6. Jun

    75° / 43°

    1 wet

  7. Jul

    80° / 50°

    2 wet

  8. Aug

    79° / 49°

    3 wet

  9. Sep

    73° / 44°

    2 wet

  10. Oct

    63° / 35°

    2 wet

  11. Nov

    53° / 28°

    3 wet

  12. Dec

    46° / 24°

    6 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Big Bear Lake, CA, 5.3 mi away at 6,753 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.

Greenhouse and Alpine Rocks is a climbing area in the Mountaintop Ranger District of San Bernardino National Forest in California, managed by the Forest Service. It sits among a cluster of climbing spots, with Alpine Rock and Tanglewood Slab each about 0.1 mile away. The area has four routes, two in sport and two in trad, with grades ranging from 5.5 to 5.10c. Pop's Day is a trad 5.5, and Lud is a trad 5.9. The sport routes are Smith at 5.10b and Canned Lizard at 5.10c. Summer is the warmest stretch. Typical averages from the nearby Big Bear Lake weather station, which sits about 900 feet lower, show July highs around 80°F with lows near 50°F. Winter highs there hover around 46°F, and the station records about six wet days a month from December through February. Tanglewood Group Camp is 0.8 mile away, and Van Dusen Canyon Spur is 2.2 miles off. Big Bear Lake Recreation Area is 3.8 miles away, and Holcomb Valley Ranch is 3.1 miles away.

Routes (4)