Links Hopkinton Info Hopkinton Trails Committee Hopkinton Upper Charles Trail Committee Hopkinton Open Space Preservation Commission Hopkinton Area Land Trust Friends of Whitehall Hopkinton State Park Whitehall State Park Waseeka Wildlife Sanctuary Lake Maspenock Preservation Association Whitehall Woods Other Links Ashland Trails Framingham Trails Holliston Trails Milford Trails Milford Rail Trail brochure (.pdf) Natick Trails Northborough Trails Southborough Trails Upton Trails Westborough Trails Sudbury Valley Trustees OARS (Sudbury/Assabet/Concerd rivers association) Ashland State Park Upton State Forest Blackstone Canal State Park Assabet River Rail Trail Upper Charles Trail Southern NE Trunkline Trail New England National Scenic Trail Friends of Upton State Forest Upper Charles Conservation Land Trust Blackstone Valley NEMBA AMC Worcester Chapter Walk 'n Mass Volkssport Club Medway Trail Club