California · Bouldering · Running Springs

On Interstate 15

Among the easier routes at The Big Heat Formation.

V-easy
grade
Bouldering Pads
style

Is On Interstate 15 open right now?

Closure in the area

There's a closure order in Mountaintop Ranger District. It doesn't name On Interstate 15, 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 On Interstate 15

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, 8.1 mi away at 6,753 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

One of the easier climbs catalogued at The Big Heat Formation, where routes span from V0+ to V5.