Iowa · Rock climbing · Maquoketa

Joinerville (bouldering only)

29 routes
V0 – V5
Bouldering
Apr–Oct
best months

Joinerville is a bouldering-only climbing area in Joinerville Park in Iowa, on county land. It sits among a cluster of named boulders, with Alcove boulder, Freshman Boulder and Project boulder all about 0.1 mile away. The area is a compact, close-together set of boulders rather than a single route, and it works well for a short session of bouldering on a single visit. The climbing here is all bouldering, with 29 routes spread across the park. The grades run from V0 to V5, with the median at V1. Some of the named routes include Blumpy at V0, Hollow Earth at V2+, and sure shot at V5. The boulders are close enough together that it's easy to move from one to another in a single outing. For comfortable weather, late spring and early fall are the best bets. Typical averages from the nearby Maquoketa weather station show May highs around 70°F and September highs around 75°F, with July the warmest month at about 82°F. Winter is cold, with January highs near 27°F and several snowy days each month from December through February. The Walnut Trail is about 6 miles away, and the Brookfield Recreation Trail is about 7.6 miles away, for anyone who wants to pair a bouldering session with a walk.

  • Best time to go · Apr–Oct

    Best time to visit Joinerville (bouldering only)

    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

      27° / 11°

      8 wet · 6 snow

    2. Feb

      31° / 15°

      7 wet · 5 snow

    3. Mar

      45° / 26°

      9 wet · 3 snow

    4. Apr

      59° / 37°

      11 wet · 1 snow

    5. May

      70° / 49°

      12 wet

    6. Jun

      79° / 60°

      11 wet

    7. Jul

      82° / 63°

      10 wet

    8. Aug

      81° / 61°

      9 wet

    9. Sep

      75° / 52°

      8 wet

    10. Oct

      62° / 40°

      9 wet

    11. Nov

      46° / 28°

      8 wet · 2 snow

    12. Dec

      32° / 18°

      8 wet · 5 snow

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Maquoketa, IA, 4.5 mi away at 668 ft. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

Routes (29)

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E: Twin SistersPhoto: Eric Schmuttenmaer from Downers Grove, USA, CC BY-SA 2.0 (via Wikimedia Commons)

E: Twin Sisters

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D: Open BiblePhoto: Eric Schmuttenmaer from Downers Grove, USA, CC BY-SA 2.0 (via Wikimedia Commons)

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C: Sun ButtressPhoto: Eric Schmuttenmaer from Downers Grove, USA, CC BY-SA 2.0 (via Wikimedia Commons)

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