Parks · Twin Cities
William O'Brien State Park
Paid · 16821 O'Brien Trail N, Marine on St. Croix, MN 55047, Marine on St. Croix, MN · Directions ↗
A gentle family state park on the St. Croix near Marine — river paddling, sandy swimming, and rolling trails. A state-park permit is required.
Official page — hours & details ↗
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