California · Bouldering · Idyllwild

J Dyno

Upper-grade problem at Halo Boulder in the San Jacinto Mountains.

V3
grade
Bouldering Pads
style

Is J Dyno open right now?

Alert in the area

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

As of · Source: USFS · San Bernardino National Forest. Agencies don't list every closure — check before you go.

Best time to visit J Dyno

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, 3.6 mi away at 5,380 ft. The station sits about 700 ft higher than this place, so expect it a little warmer here. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

One of three V3s catalogued at Halo Boulder in the San Jacinto Mountains, this climb sits at the upper end of the grade span documented at the sector.

Photo of the crag

San Jacinto Mountains — the crag this route is on
San Jacinto Mountains, California — this photo shows the crag, not this individual route.Photo: inkknife_2000 (7.5 million views +), CC BY-SA 2.0 (via Wikimedia Commons)

Keep exploring — more climbs worth the drive