Monocacy NRMA comprises 1,800 acres and is located in Frederick County – Western Maryland. Hours of Operation: Open daily – sunrise to sunset. Trail Miles: 5.6  Day Use Parking is located at Furnace Ford or Ed Sears Trailhead. Horse Camping: No The Monocacy NRMA trail map is available for download when you subscribe or you can purchase the printed Western MD trail Read more...