Pennsylvania · Rock climbing · Portersville

Birthday Boulder

8 routes
V0- – V5
Bouldering
Aug–Sep
best months

Birthday Boulder is a bouldering area in McConnells Mill State Park in Pennsylvania, managed by State Park and Recreation. It sits among several other climbing spots, including Hidden in Plain Sight, Island Block and Rappel Rock, all about 0.1 mile away, and the Slippery Rock Gorge Trail (NCT) passes right by it. The climbing here is all bouldering, with eight routes ranging from V0- to V5. Jail Bait is the easiest at V0-, and Happy Happy Joy Joy and The Cutting Edge are the hardest at V5. Middle Edge is a V3, and The Edge of Consent is a V4. Summer is the warmest stretch for a visit. Typical averages from a nearby weather station run from highs around 77°F in June to about 81°F in July, with September still near 74°F. Winter is cold, with January highs around 33°F and lows near 17°F. The North Country Trail and Glacier Ridge Trail (NCT) are both within about 3 miles, and the Five Points Trail is about 3.2 miles away.

  • Best time to go · Aug–Sep

    Best time to visit Birthday Boulder

    Best months: August–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

      33° / 17°

      16 wet

    2. Feb

      37° / 18°

      14 wet

    3. Mar

      46° / 25°

      14 wet

    4. Apr

      59° / 35°

      14 wet

    5. May

      69° / 45°

      15 wet

    6. Jun

      77° / 54°

      14 wet

    7. Jul

      81° / 58°

      13 wet

    8. Aug

      80° / 56°

      12 wet

    9. Sep

      74° / 50°

      11 wet

    10. Oct

      61° / 39°

      13 wet

    11. Nov

      49° / 31°

      13 wet

    12. Dec

      38° / 23°

      15 wet

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Slippery Rock 1 Ssw, PA, 9.2 mi away at 1,260 ft. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Routes (8)

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Rappel RockPhoto: Doug Kerr from Albany, NY, United States, CC BY-SA 2.0 (via Wikimedia Commons)

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Island BlockPhoto: Doug Kerr from Albany, NY, United States, CC BY-SA 2.0 (via Wikimedia Commons)

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Hidden in Plain SightPhoto: Doug Kerr from Albany, NY, United States, CC BY-SA 2.0 (via Wikimedia Commons)

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