| Assabet River National Wildlife Refuge | |
| Source: | U.S. Fish and Wildlife Service |
| Other maps: | brochure |
| Also in: | Hudson Maynard Stow Sudbury |
| Assabet River Rail Trail - 5-Town Trail Route | |
| Source: | Town of Hudson |
| Also in: | Acton Hudson Maynard Stow |
| Assabet River Rail Trail - Marlborough section | |
| Source: | Town of Hudson |
| Boroughs Loop Trail - section 1 | |
| Source: | Sudbury Valley Trustees |
| Other maps: | section 2 overview inc. Northborough, Southborough, and Westborough sections |
| Callahan State Park | |
| Source: | Mass. DCR |
| Other maps: | suggested hikes, rides, and paddles |
| Also in: | Framingham Southborough |
| Callahan State Park | |
| Source: | Bikerag.net |
| Also in: | Framingham Southborough |
| Cider Knoll - Mello Family Meadow | |
| Source: | City of Marlborough |
| Cedar Hill and Sawink Farm Reservation | |
| Source: | Sudbury Valley Trustees |
| Also in: | Northborough Southborough Westborough |
| Felton Conservation Land | |
| Source: | City of Marlborough |
| Flagg Swamp | |
| Source: | City of Marlborough |
| Ghiloni Nature Trail - Marlborough State Forest | |
| Source: | City of Marlborough |
| The Grove Conservation Land | |
| Source: | City of Marlborough |
| Holt's Grove Conservation Land | |
| Source: | City of Marlborough |
| Howe Pond | |
| Source: | City of Marlborough |
| Indian Head Hill | |
| Source: | City of Marlborough |
| Jericho Hill Recreation Area | |
| Source: | City of Marlborough |
| Lake Williams Trail | |
| Source: | City of Marlborough |
| Marlborough Conservation Land - overview map | |
| Source: | City of Marlborough |
| Memorial Forest - The Desert | |
| Source: | Sudbury Valley Trustees |
| Also in: | Sudbury |
| Mount Ward Conservation Land | |
| Source: | City of Marlborough |
| Panther Trail | |
| Source: | City of Marlborough |
| Sheep Falls Brook Conservation Area | |
| Source: | City of Marlborough |
| Sudbrury Reservoir | |
| Source: | City of Marlborough |
| Wachusett Aqueduct Trail (four-town route) | |
| Source: | Bike New England.com |
| Also in: | Berlin Clinton Northborough |
Sully says check out the Masstrails Big Map! Interactive, zoomable, clickable map of every rail-trail in Massachusetts plus highlights of open spaces from the Cape to the Berkshires!