Northwest Branch Stream Valley Park
Managed by Montgomery Parks
81 acres
Dog rules not recorded
Directionsto the parking lotWebsite ↗
College Heights Estates Historic District · Photo: Farragutful · CC BY-SA 4.0BOutdoors
Outdoors in Adelphi
10% of Adelphi’s land is conserved: 171 acres
90% of residents live within a half mile of a park. 0.4 miles of mapped trail cross Adelphi, 0.1 per square mile of land. 83 acres are parks and preserves, 4.8 per 1,000 residents.
Ahead of 55% of U.S. towns · #182 of 261 in Maryland. What drives it
Conserved land
10%
171 acres · of 2.7 sq mi of land
Trails
0.4 mi
0.1 per sq mi of land
Park land
83 ac
4.8 acres per 1,000 residents
Near a park
90%
of residents within ½ mile
Bike routes
2.9 mi
0.2 mi lanes · 2.1 mi paths
Lakes & rivers
1
What kind of outdoors town is Adelphi?
Read from the map. The page puts what stands out first.
Outdoors grade
How much outdoors does Adelphi have?
On conserved land, trails, park land and how close residents live to a park, Adelphi is ahead of 55% of U.S. towns, #182 of 261 in Maryland. Conserved land holds the grade up; park acres per resident pull it down.
B
OutdoorsA character grade: shown, never part of Adelphi’s overall grade.
Conserved land10% of the land · typical MD town 9% · U.S. 4%A−Trails0.1 miles of mapped trail per square mile of land (0 mi) · MD 0.5 · U.S. 0.4C+Park land4.8 acres of park per 1,000 residents (83 acres) · MD 9 · U.S. 13CParks close to home90% of residents within a half mile of a park · MD 87% · U.S. 72%B+
All U.S. towns we grade (21,298)Ahead of 55%
LessMore
Maryland towns of 2,500+ (261)Ahead of 30%
Maryland towns conserve more land than most (a typical one, 9%; the U.S., 4%), so Adelphi’s 10% is ahead of 53% of Maryland towns, while its trails per square mile lead 17% of them.
How sure. Graded on any three of the four inputs instead, the letter would range from C+ to B+. 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
Directions go to the nearest trailhead or public parking.
Adelphi Manor Park
Managed by Prince George's County Department of Parks and Recreation
29 acres0.1 mi of trail
Dog rules not recorded
Directionsto the parking lot
Adelphi Mill Recreation Center
Managed by Prince George's County Department of Parks and Recreation
3 acres
Dog rules not recorded
Directionsto the parking lot
Who protects it
171 conserved acres
10% of Adelphi’s land. Who manages Adelphi’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
Other or Unknown Local Government52 ac
Regional agency33 ac
County8 ac
Other state land1 ac
Not recorded114 ac
State Other or Unknown · 113 acLocal Park · 81 acConservation Easement · 7 acForest Stewardship Easement · 5 acPrivate Other or Unknown · 1 ac
Good to know
Conserved doesn’t always mean open to visitors. 8 acres are conservation easements, usually private land. Public access isn’t recorded for 8 of 17 parcels. The walks above are places people visit.
The biggest protected parcels
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Northwest Branch Park State Other or Unknown | Not recorded | 113 | Unknown |
| Buck Lodge Community Park Local Park | Other or Unknown Local Government | 41 | Open |
| Adelphi Manor Park Building Local Park | Regional agency | 29 | Open |
| Adelphi Park Local Park | Other or Unknown Local Government | 8 | Open |
| Adelphi Mill Historic Site Local Park | Regional agency | 3 | Open |
| Adelphi Community Park Private Other or Unknown | Not recorded | 1 | Unknown |
Things to do
18 places to go in Adelphi
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Playgrounds in Adelphi
17 playgrounds without a name on the map. Tap “Show all on map” to see them.
Community gardens in Adelphi
1 community garden without a name on the map. Tap “Show all on map” to see it.
Trails & water
1 lakes & rivers
Lakes & rivers tap for directions
Biking & sports
2.9 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
0.2 mi
painted or protected bike lanes
2.1 mi
off-road bike paths
0.6 mi
shoulders & shared lanes
Courts & fields
7Basketball
4Tennis
2Baseball
1Soccer
Includes school and college facilities, which aren’t always open to the public.
History along the way
History →1 place on the National Register
The country’s official list of places worth saving (National Park Service).
College Heights Estates Historic DistrictDistrict · listed 2012
About itWhen to get out
The best walking months in Adelphi: April to June and August
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) | 9.7 | 10.7 | 11.8 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.1 | 10.0 | 9.4 |
| High (°F) | 43 | 47 | 55 | 67 | 75 | 84 | 88 | 86 | 79 | 68 | 57 | 47 |
| Rain (in) | 2.9 | 2.6 | 3.8 | 3.4 | 4.2 | 4.3 | 4.5 | 3.9 | 4.4 | 3.9 | 3.1 | 3.7 |
February is the driest month (2.6 in) and July the warmest (highs of 88 °F). 4.5 inches fall in July, the wettest month. Summer highs reach 88 °F, too hot for the outline. The climate in Adelphi →
Next door
Adelphi and its neighbors
Tap a town to see its outdoors.
Silver Spring11 miCollege Park4.3 miHillandale3.7 miChillum1.6 miHyattsville1.2 miAdelphi0.4 miLangley Park0.1 mi
| Town | Conserved of land | Trail mi per sq mi | Park acres per 1,000 | Near a park ½ mile | Outdoors |
|---|---|---|---|---|---|
| Adelphi | 10% | 0.1 | 5 | 90% | B |
| College Park | 12% | 0.8 | 6 | 99% | A− |
| Langley Park | 6% | 0.1 | under 1 | 99%+ | B− |
| Hyattsville | 11% | 0.4 | 3 | 99%+ | B+ |
| Hillandale | 12% | 2.0 | 17 | 99%+ | A+ |
| Chillum | 17% | 0.5 | 4 | 99%+ | A− |
| Silver Spring | 15% | 1.4 | 3 | 99%+ | A− |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Adelphi
Where can I hike in Adelphi?
The longest trail networks: Adelphi Manor Park, 0.1 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Adelphi is conserved land?
10% of its land, against a typical 9% for a Maryland town and 4% nationally (PAD-US). Conserved doesn’t always mean open to visitors: easements are usually private land.
Are dogs allowed on Adelphi’s trails?
Northwest Branch Stream Valley Park and Adelphi Manor Park don’t have dog rules recorded on the map; check the signs at the trailhead.
Where can I bike in Adelphi?
2.9 miles of bike routes are on the map: 0.2 of painted or protected lanes, 2.1 of off-road paths and 0.6 of shoulders and shared lanes.
Is there public land near Adelphi?
16,820 acres of parks and open public land lie inside Adelphi or within 10 miles of it (PAD-US), 83 of them inside the town line.
How much outdoors does Adelphi have?
Ahead of 55% of U.S. towns on the Outdoors grade, #182 of 261 in Maryland. 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 Adelphi 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 →