Main Boulder

Main Boulder is a bouldering area in Blue Mounds State Park in Minnesota, managed by State Park and Recreation. It sits among a cluster of climbing areas, with Boulder Area 3, Boulder Area 2 and Farmhouse Boulders all about 0.1 mile away. The climbing here is all bouldering, with six routes spread across the V1 to V4 range. The Middle Arete Traverse is the hardest at V4, and Buff Sauce, a V4 route with a first ascent by Craig Nelson, is one of the named options. The routes are short and sit close together, so the area works well for a session of several problems in one visit. For timing, late spring and early fall are the most comfortable. Typical averages from a nearby weather station in Rock Rapids, Iowa, show May highs around 70°F and September highs around 75°F, with July peaking near 85°F. Winter is cold, with January highs around 25°F. Other bouldering is close by. Bessie The Cow and Bur Oak Trail are each about 0.2 mile away, and Quarry Boulder is about half a mile off.