Mushroom Boulder

Is Mushroom 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 23, 8:00 pm PDT · Source: USFS · San Bernardino National Forest. Agencies don't list every closure — check before you go.

Best time to visit Mushroom 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, 1.5 mi away at 5,380 ft. Source: NOAA NCEI U.S. Climate Normals 1991–2020.