Maryland · Rock climbing · Hydes

Alien Crag

5 routes
V1-2 – V4-5
Bouldering · Top Rope
Apr–Jun, Aug–Nov
best months

Alien Crag is a climbing area in Maryland, about 0.3 miles from the community of Laurel Brook. It sits among a cluster of bouldering spots, with several other climbing areas within a short distance and a few hiking trails close by. Spring and fall are the most comfortable times to visit. Typical averages from a nearby weather station in Aberdeen run to highs around 73°F in May and 67°F in October, while July highs average about 86°F and January highs sit near 42°F. Positive Systems Boulder is just 0.2 miles away, and Fallston Boulder Garden and Hot Spot Boulder are each about 0.3 miles off. The Yellow Trail is roughly half a mile away for a walk between climbing sessions.

  • Best time to go · Apr–Jun, Aug–Nov

    Best time to visit Alien Crag

    Best months: April–June and August–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

      42° / 25°

    2. Feb

      44° / 27°

    3. Mar

      52° / 33°

    4. Apr

      65° / 43°

    5. May

      73° / 53°

    6. Jun

      82° / 62°

    7. Jul

      86° / 68°

    8. Aug

      84° / 66°

    9. Sep

      78° / 59°

    10. Oct

      67° / 46°

    11. Nov

      56° / 37°

    12. Dec

      46° / 30°

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Aberdeen Phillips Fld, MD, 14 mi away at 57 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Routes (5)

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Biceps WallPhoto: michaelwm25, CC BY 3.0 (via Wikimedia Commons)

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Moby Dick and Trailer BouldersPhoto: michaelwm25, CC BY 3.0 (via Wikimedia Commons)

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Titanic AreaPhoto: michaelwm25, CC BY 3.0 (via Wikimedia Commons)

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Friction WallPhoto: Jstuby, CC BY-SA 3.0 (via Wikimedia Commons)

Friction Wall

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Positive Systems Boulder

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5 bouldering routes at Positive Systems Boulder in Maryland.

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Fallston Boulder Garden

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Hot Spot Boulder

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Little Gunpowder Boulders

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Little Gunpowder Falls Crag

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Fox Hill Crag

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