Minnesota State Park · MN
Old Mill State Park is open.
Last checked Wed, 14 Oct 2026 13:00:58 GMT
Old Mill State Park is a small Minnesota state park on the Middle River between Argyle and Newfolden on an ancient beach of glacial Lake Agassiz in Marshall County in the northwestern part of the state.
Old Mill State Park is a small Minnesota state park on the Middle River between Argyle and Newfolden on an ancient beach of glacial Lake Agassiz in Marshall County in the northwestern part of the state.
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We derive Old Mill State Park's status from the park system's public alerts, refreshed hourly — this is our reading, not an official determination. As of the last check: Open — visitor notes posted on the park's page. Full method: how we check park status.