Connecticut · Rock climbing · Groton

Dark Hollow

9 routes
V1 – V7
Bouldering
Apr–Oct
best months

Dark Hollow is a bouldering area in Connecticut, about 1.4 miles from Center Groton. It sits among several other climbing areas, including the Ledyard Areas, Left Side and Glacial Park, all within about a tenth of a mile. The climbing here is all bouldering, with nine routes ranging from V1 to V7. The most comfortable months for a visit are late spring through early fall. Typical averages from the nearby Groton weather station run from highs around 66°F in May to about 81°F in July, with September easing back to the mid-70s. The routes include Raining Red Clocks at V1 and Wings of Death at V7, with Black Mamba and Bleeding Red Clock at V3. For a walk nearby, the Gosa Blue Trail and Gosa Red Trail are both about 1.9 miles away.

  • Best time to go · Apr–Oct

    Best time to visit Dark Hollow

    Best months: April–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

      39° / 24°

      11 wet · 3 snow

    2. Feb

      41° / 25°

      10 wet · 3 snow

    3. Mar

      47° / 32°

      12 wet · 2 snow

    4. Apr

      57° / 41°

      12 wet

    5. May

      66° / 50°

      12 wet

    6. Jun

      75° / 59°

      10 wet

    7. Jul

      81° / 66°

      10 wet

    8. Aug

      80° / 65°

      10 wet

    9. Sep

      74° / 58°

      10 wet

    10. Oct

      63° / 47°

      11 wet

    11. Nov

      53° / 38°

      10 wet

    12. Dec

      44° / 30°

      12 wet · 2 snow

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Groton, CT, 1.7 mi away at 40 ft. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Routes (9)

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Keeny Road BouldersPhoto: Morrowlong, CC BY-SA 4.0 (via Wikimedia Commons)

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East Lyme PropertyPhoto: Morrowlong, CC BY-SA 4.0 (via Wikimedia Commons)

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