Minnesota cross-country ski system
William O'Brien State Park
Marine on St. Croix · Twin Cities / St. Croix
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About William O'Brien State Park
Roughly 12 miles of groomed cross-country and skate trail along the St. Croix, close enough to the metro for same-day condition decisions.
Check Minnesota DNRModeled weather and surface timing are screening signals. Grooming, opening, pass requirements and actual trail conditions must be verified with the official source.