Colorado · Rock climbing · Idaho Springs

Unknown 4

One of nine routes at Main Slab, mid-range in the crag's 5.9- to 5.12- span.

5.10b
grade
Sport Bolted
style

Is Unknown 4 open right now?

Alert in the area

The Forest Service lists 3 alerts for Arapaho and Roosevelt National Forests.

As of · Source: USFS · Arapaho and Roosevelt National Forests. Agencies don't list every closure — check before you go.

Best time to visit Unknown 4

Best months: June and September. 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

    32° / 12°

    8 wet

  2. Feb

    31° / 11°

    8 wet

  3. Mar

    38° / 17°

    9 wet

  4. Apr

    43° / 23°

    10 wet

  5. May

    53° / 31°

    9 wet

  6. Jun

    64° / 40°

    9 wet

  7. Jul

    69° / 46°

    13 wet

  8. Aug

    67° / 44°

    14 wet

  9. Sep

    61° / 38°

    10 wet

  10. Oct

    50° / 29°

    7 wet

  11. Nov

    39° / 19°

    7 wet

  12. Dec

    32° / 12°

    8 wet

Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Cabin Creek, CO, 7.2 mi away at 10,020 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.

One of nine routes catalogued at Main Slab, this climb sits in the middle of the crag's range from 5.9- to 5.12-.

Keep exploring — more climbs worth the drive

Local businesses nearby

Outfitters and businesses near Idaho Springs. They haven’t set up their Roamze page yet.

Boulder Rock Club

Rock Climbing business nearby (~30 mi away) — hasn't claimed their Roamze page yet

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Movement Gyms

Rock Climbing business nearby (~30 mi away) — hasn't claimed their Roamze page yet

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Übergrippen Indoor Climbing Crag

Rock Climbing business nearby (~37 mi away) — hasn't claimed their Roamze page yet

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