Speed of Light Boulder

Is Speed of Light Boulder open right now?

Alert in the area

The Forest Service lists 2 alerts for San Bernardino National Forest.

• Safety Alert - Falling Rocks at Bonita Falls

  Agency alert covering San Bernardino National Forest · USFS · San Bernardino National Forest

• Fire Restrictions

  Agency alert covering San Bernardino National Forest · Order 05-12-00-26-05 · USFS · San Bernardino National Forest

As of Oct 24, 8:45 am PDT · Source: USFS · San Bernardino National Forest. Agencies don't list every closure — check before you go.

Best time to visit Speed of Light Boulder

Best months: April–July and September–November. 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

   55° / 31°

   7 wet · 2 snow

2. Feb

   54° / 30°

   7 wet · 3 snow

3. Mar

   59° / 32°

   6 wet · 2 snow

4. Apr

   64° / 35°

   4 wet · 1 snow

5. May

   71° / 41°

   2 wet

6. Jun

   80° / 48°

   1 wet

7. Jul

   85° / 55°

   2 wet

8. Aug

   86° / 55°

   3 wet

9. Sep

   81° / 50°

   2 wet

10. Oct

    72° / 42°

    2 wet

11. Nov

    62° / 35°

    4 wet · 1 snow

12. Dec

    54° / 30°

    6 wet · 2 snow

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Idyllwild Fire Dept, CA, 2.3 mi away at 5,380 ft. The station sits about 700 ft lower than this place, so expect it a little cooler here. Source: NOAA NCEI U.S. Climate Normals 1991–2020.