Hopkinton-Everett Reservoir Trails: OPEN Miles: 26 Parking: The parking area may be accessed via Route 77 to Ray Road in Dunbarton. Maintained by: Merrimack Valley Trail Riders, NH Bureau of Trails Notice: Please be aware that the Hopkinton-Everett Trails Area is located within a US Army Corp of Engineers flood control project area. The trails area may be closed to public recreational use at any time, without notice, for flood control purposes. Hopkinton-Everett Trails Map NEMBA's Places to Ride at Hopkington-Everett Reservoir