The Mill Race Preserve Area of Four Mile Creek MetroPark is a 75-acre preserve area which offers 2 miles of hiking trails through meadows and wooded stream corridors along Four Mile Creek. The Mill Race Preserve is accessible by the Oxford Area Trail System (OATS) by pedestrians via the Black Covered Bridge on Corso Rd. just north of the City of Oxford in Oxford Township and is located at 5537 Morning Sun Road, Oxford, OH.