Sudbury Reservoir Watershed
Managed by MA Department of Conservation and Recreation
816 acres8.1 mi of trail
Panther TrailBay Circuit TrailPeninsula LoopCrane Swamp Trail+1
Dog rules not recorded
Directionsto the parking lot
Photo: John Phelan · CC BY 3.0A+Outdoors
Outdoors in Marlborough
Marlborough has 58 miles of mapped trails, 2.8 for every square mile of land
19% of Marlborough’s land is conserved, about 2,489 acres. 95% of residents live within a half mile of a park. The biggest trail networks: Sudbury Reservoir Watershed (8.1 mi), Callahan State Park (6.8 mi), Cider Knoll Conservation Land (2.9 mi).
Ahead of 96% of U.S. towns · #136 of 283 in Massachusetts. What drives it
Conserved land
19%
2,489 acres · of 20.9 sq mi of land
Trails
58 mi
2.8 per sq mi of land
Park land
1,444 ac
35 acres per 1,000 residents
Near a park
95%
of residents within ½ mile
Bike routes
6.9 mi
4.4 mi lanes · 2.3 mi paths
Highest peak
564 ft
Sligo Hill
Lakes & rivers
9
2 beaches · 3 boat launches
What kind of outdoors town is Marlborough?
Read from the map. The page puts what stands out first.
Outdoors grade
How much outdoors does Marlborough have?
On conserved land, trails, park land and how close residents live to a park, Marlborough is ahead of 96% of U.S. towns, #136 of 283 in Massachusetts. All four inputs are above most U.S. towns; trail miles rank highest, park acres per resident lowest.
A+
OutdoorsA character grade: shown, never part of Marlborough’s overall grade.
Conserved land19% of the land · typical MA town 21% · U.S. 4%ATrails2.8 miles of mapped trail per square mile of land (58 mi) · MA 1.9 · U.S. 0.4A+Park land35 acres of park per 1,000 residents (1,444 acres) · MA 91 · U.S. 13B+Parks close to home95% of residents within a half mile of a park · MA 93% · U.S. 72%A−
All U.S. towns we grade (21,298)Ahead of 96%
LessMore
Massachusetts towns of 2,500+ (283)Ahead of 52%
Massachusetts towns conserve more land than most (a typical one, 21%; the U.S., 4%), so Marlborough’s 19% is ahead of 39% of Massachusetts towns, while its trails per square mile lead 72% of them.
Water is 6% of Marlborough’s area (1 of 22 square miles), so every share here is of land; over land and water together, the conserved share would read 18%.
How sure. Graded on any three of the four inputs instead, the letter would range from A to A+. Trails and many small parks come from OpenStreetMap, mapped by volunteers, so coverage varies from town to town; the half mile is a straight line from each census block, so a river or highway in the way isn’t counted against it.
PAD-US, OpenStreetMap (© OpenStreetMap contributors), Census 2025 Gazetteer and 2020 blocks; details in Sources below. How TownRatings grades the outdoors →
The map
Conserved land, trails & bike routes
Tap a number to zoom to a park. Tap a layer to hide it.
Easements protect land from building but are usually private.© OpenStreetMap contributors · USGS PAD-US
Places to walk
Pick a walk
The longest trail network is Sudbury Reservoir Watershed, with 8.1 miles. Directions go to the nearest trailhead or public parking.
Callahan State Park
Nature preserve
280 acres6.8 mi of trail
Backpacker TrailBear Paw TrailAcorn TrailPine Tree Loop Trail+1
Dog rules not recorded
Directionsto the parking lot
Cider Knoll Conservation Land
Nature preserve
108 acres2.9 mi of trail
Crane MeadowsGround
Dog rules not recorded
Directionsto the parking lot
Sheep Falls Brook Conservation Area
Nature preserve
64 acres2.6 mi of trail
Sheepfalls Brook Trail
Dog rules not recorded
Directionsto the parking lot
Felton Conservation Area
Nature preserve
58 acres1.7 mi of trail
Panther TrailBurroughs loop trail
Dog rules not recorded
Directionsto the parking lot
Marlborough-Sudbury State Forest
Managed by Division of State Parks and Recreation
119 acres1.5 mi of trail
Hudson TrailWitches' Cove Trail
Dog rules not recorded
Directionsto the parking lot
Lake Williams
Nature preserve
111 acres1.4 mi of trail
Dog rules not recorded
Directionsto the parking lot
Desert Conservation Land
Managed by City of Marlborough
108 acres1.4 mi of trail
Cranberry Brook TrailDesert TrailPlymton Trail
Dog rules not recorded
Directionsto the trail sign
All 32 parks & preserves
Sudbury Reservoir Watershed816 acres · 8.1 mi of trail · MA Department of Conservation and Recreation
DirectionsCallahan State Park280 acres · 6.8 mi of trail
DirectionsCider Knoll Conservation Land108 acres · 2.9 mi of trail
DirectionsSheep Falls Brook Conservation Area64 acres · 2.6 mi of trail
DirectionsFelton Conservation Area58 acres · 1.7 mi of trail
DirectionsMarlborough-Sudbury State Forest119 acres · 1.5 mi of trail · Division of State Parks and Recreation
DirectionsLake Williams111 acres · 1.4 mi of trail
DirectionsDesert Conservation Land108 acres · 1.4 mi of trail · City of Marlborough
DirectionsJericho Hill44 acres · 1.2 mi of trail · City of Marlborough
DirectionsThe Grove Conservation Land20 acres · 1.2 mi of trail
DirectionsGhiloni Park80 acres · 1.1 mi of trail
DirectionsFlagg Swamp Wildlife Management Area55 acres · 1 mi of trail
DirectionsHolts Grove Conservation Land27 acres · 1 mi of trail
DirectionsArtemas Ward Park11 acres · 0.7 mi of trail
DirectionsMemorial Forest36 acres · 0.4 mi of trail · Sudbury Valley Trustees
DirectionsLower Pleasant Street Conservation Area24 acres · 0.3 mi of trail
City Forest18 acres · 0.3 mi of trail
West Hill Road Conservation Area20 acres · 0.1 mi of trail
Bigelow Street Conservation Land8 acres · 0.1 mi of trail
Simmons Street Conservation Area8 acres · 0.1 mi of trail
DirectionsKelleher Field5 acres · 0.1 mi of trail
DirectionsUnion Square1 acres · 0.1 mi of trail
DirectionsTyler Flood Control Site45 acres
DirectionsHowe Pond Land15 acres
Stevens Howe Park10 acres
DirectionsMemorial Beach Park8 acres
DirectionsCarisbrooke Park8 acres
Korean War Vet Park6 acres
DirectionsStevens Street Land6 acres
Simpson Road Park2 acres
Barberry Farms Conservation Area1 acres
John Street Park1 acres · City of Marlborough
DirectionsWho protects it
2,489 conserved acres
19% of Marlborough’s land. Water is left out: Marlborough has 20.9 square miles of land and 1.2 of water, so the share counts land only. Who manages Marlborough’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
Town or city511 ac
State parks206 ac
State fish & wildlife55 ac
State conservation18 ac
Land trusts & nonprofits4 ac
Not recorded1,910 ac
Watershed Protection Area · 898 acLocal Other or Unknown · 388 acState Resource Management Area · 387 acState Park · 321 acResearch or Educational Area · 146 ac
Good to know
Conserved doesn’t always mean open to visitors. 51 acres are conservation easements, usually private land. Public access isn’t recorded for 2 of 76 parcels. The walks above are places people visit.
The biggest protected parcels
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Sudbury Reservoir Watershed Watershed Protection Area | Not recorded | 535 | Restricted |
| Millham Reservoir Reservation Watershed Protection Area | Town or city | 342 | Closed |
| Callahan State Park State Park | Not recorded | 321 | Open |
| Marlborough Sudbury State Forest State Resource Management Area | State parks | 193 | Open |
| Marlborough-Sudbury State Forest State Resource Management Area | Not recorded | 193 | Open |
| Marlborough Country Club Private Other or Unknown | Not recorded | 122 | Restricted |
| Assabet Valley Regional Vocational School Athletic Fields Research or Educational Area | Not recorded | 69 | Open |
| Desert Conservation Area Local Other or Unknown | Not recorded | 64 | Open |
| Felton Conservation Area Local Other or Unknown | Not recorded | 58 | Open |
| Flagg Swamp Wildlife Management Area State Conservation Area | State fish & wildlife | 55 | Restricted |
5 smaller protected places aren’t shown.
Things to do
56 places to go in Marlborough
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Beaches in Marlborough
Memorial BeachIn Memorial Beach Park
DirectionsPlus 1 beach without a name on the map. Tap “Show all on map” to see it.
Public pools in Marlborough
Mushroom pondIn Artemas Ward Park
DirectionsPlaygrounds in Marlborough
Howe PlaygroundIn Stevens Howe Park
DirectionsSimpson Park PlaygroundIn Simpson Road Park
DirectionsPlus 25 playgrounds without a name on the map. Tap “Show all on map” to see them.
Dog parks in Marlborough
Marlborough Dog ParkIn Ghiloni Park
DirectionsPlus 1 dog park without a name on the map.
Boat launches in Marlborough
Canoe and Kayak launch
Directionsseasonal car top boat slipway
DirectionsPlus 1 boat launch without a name on the map.
Waterfalls in Marlborough
1 waterfall without a name on the map.
Scenic views in Marlborough
2 scenic views without a name on the map.
Peaks in Marlborough
Sligo Hill564 ft elevation
DirectionsPleasant Hill538 ft elevation
DirectionsFairmount Hill528 ft elevation
DirectionsJericho Hill528 ft elevation · In Jericho Hill
DirectionsWest Hill525 ft elevation
DirectionsBear Hill505 ft elevation
DirectionsShoestring Hill502 ft elevation
DirectionsCrane Hill479 ft elevation
Directions9 more peaks
Spoon Hill479 ft elevation
DirectionsStirrup Hill466 ft elevation
DirectionsFarm Hill456 ft elevation
DirectionsProspect Hill453 ft elevation
DirectionsAddition Hill443 ft elevation
DirectionsIndian Head Hill404 ft elevation
DirectionsMount Ward394 ft elevation
DirectionsWheeler Hill381 ft elevation
DirectionsHager Hill377 ft elevation
DirectionsCommunity gardens in Marlborough
Cider Knoll Community GardenIn Cider Knoll Conservation Land · Marlborough Conservation Commission
DirectionsTrails & water
25 named trails and 9 lakes & rivers
Named trails
Open to bikes · 6.1 miUnpaved · 26.8 mi
Panther Trail4.1 mi
Backpacker Trail1.3 mi
Sheepfalls Brook Trail1.0 mi
Bear Paw Trail0.9 mi
Acorn Trail0.7 mi
Indian Hill0.7 mi
Main Trail (White)0.7 mi
Bay Circuit Trail0.7 mi
Hudson Trail0.6 mi
Peninsula Loop0.5 mi
15 more trails
Pine Tree Loop Trail
0.5 miDeearmouse Trail
0.5 miPlymton Trail
0.5 miCrane Meadows
0.4 miFlying Squirrel Trail
0.4 miValley Trail (Red)
0.3 miBurroughs loop trail
0.3 miWitches' Cove Trail
0.3 miCranberry Brook Trail
0.2 miCrane Swamp Trail
0.2 miChipmunk
0.2 miOrange Blazed Trail
0.2 miDesert Trail
0.2 miLee's Loop (Blue)
0.2 miGround
0.1 miBiking & sports
6.9 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
4.4 mi
painted or protected bike lanes
2.3 mi
off-road bike paths
0.1 mi
shoulders & shared lanes
Courts & fields
28Basketball
23Tennis
15Baseball
14Soccer
8Softball
6Pickleball
6Football
2Beach volleyball
Includes school and college facilities, which aren’t always open to the public.
History along the way
History →16 places on the National Register
The country’s official list of places worth saving (National Park Service). The map also marks 3 historic points from OpenStreetMap: plaques, memorials and old buildings.
Capt. Peter Rice HouseBuilding · listed 1980
About itTemple BuildingBuilding · listed 1983
About itWarren BlockBuilding · listed 1983
About itJohn Cotting HouseBuilding · listed 1984
About itMarlborough Brook Filter BedsStructure · listed 1990
About itMarlborough Center Historic DistrictDistrict · listed 1998
About itPleasant Street Historic DistrictDistrict · listed 2001
About itWest Main Street Historic DistrictDistrict · listed 2001
About itBrigham CemeterySite · listed 2004
About itWeeks CemeterySite · listed 2004
About itWilson CemeterySite · listed 2004
About itMaplewood CemeterySite · listed 2004
About it4 more on the History page.
When to get out
The best walking months in Marlborough: April to September
NOAA’s 1991–2020 normals for the town and the daylight at its latitude. Outlined months have long days, highs of 59 to 86 °F and little rain for the place.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.4 | 10.5 | 11.8 | 13.3 | 14.6 | 15.3 | 15.0 | 13.9 | 12.4 | 11.0 | 9.7 | 9.1 |
| High (°F) | 36 | 38 | 46 | 59 | 70 | 78 | 84 | 82 | 74 | 62 | 51 | 41 |
| Rain (in) | 3.6 | 3.3 | 4.3 | 4.2 | 3.8 | 4.3 | 3.8 | 3.9 | 4.0 | 4.9 | 3.9 | 4.5 |
February is the driest month (3.3 in) and July the warmest (highs of 84 °F). 4.9 inches fall in October, the wettest month. The climate in Marlborough →
Next door
Marlborough and its neighbors
Marlborough has the second most mapped trails of the 7 towns around it. Tap a town to see its outdoors.
| Town | Conserved of land | Trail mi per sq mi | Park acres per 1,000 | Near a park ½ mile | Outdoors |
|---|---|---|---|---|---|
| Marlborough | 19% | 2.8 | 35 | 95% | A+ |
| Northborough | 23% | 2.3 | 102 | 92% | A+ |
| Southborough | 35% | 2.3 | 72 | 74% | A+ |
| Berlin | 29% | 2.7 | 368 | 97% | A+ |
| Hudson | 14% | 1.9 | 24 | 95% | A |
| Framingham | 21% | 2.8 | 26 | 98% | A+ |
| Sudbury | 29% | 2.4 | 126 | 99%+ | A+ |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Marlborough
Where can I hike in Marlborough?
The longest trail networks: Sudbury Reservoir Watershed, 8.1 miles; Callahan State Park, 6.8 miles; Cider Knoll Conservation Land, 2.9 miles; Sheep Falls Brook Conservation Area, 2.6 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Marlborough is conserved land?
19% of its land, against a typical 21% for a Massachusetts town and 4% nationally (PAD-US). Conserved doesn’t always mean open to visitors: easements are usually private land.
Are dogs allowed on Marlborough’s trails?
Sudbury Reservoir Watershed and Callahan State Park don’t have dog rules recorded on the map; check the signs at the trailhead.
Where can I bike in Marlborough?
6.9 miles of bike routes are on the map: 4.4 of painted or protected lanes, 2.3 of off-road paths and 0.1 of shoulders and shared lanes.
Is there public land near Marlborough?
50,397 acres of parks and open public land lie inside Marlborough or within 10 miles of it (PAD-US), 1,497 of them inside the city line.
How much outdoors does Marlborough have?
Ahead of 96% of U.S. towns on the Outdoors grade, #136 of 283 in Massachusetts. The grade combines the share of land that is conserved, miles of mapped trail per square mile of land, park acres per 1,000 residents and the share of residents within a half mile of a park. It’s a character grade, so it isn’t part of the overall grade. How it works.
Trail talk
Conditions, parking and favorite walks from Marlborough neighbors.
Share a tip
Sources
Where this page comes from
Conserved and public land: USGS Protected Areas Database of the United States (PAD-US), service updated July 2026. Parks, trails, playgrounds, beaches and other places: OpenStreetMap (© OpenStreetMap contributors, ODbL), map data as of 2026-10-28. Land and water area: Census 2025 Gazetteer. Residents near a park: 2020 Census blocks. National Register: National Park Service. How TownRatings grades the outdoors →