William Cullen Bryant Preserve
Nature preserve
148 acres1.9 mi of trail
Dog rules not recorded
Directionsto the parking lot
Photo: LINYperson615 · CC BY-SA 4.0A+Outdoors
Outdoors in Roslyn Harbor
22% of Roslyn Harbor’s land is conserved: 166 acres
2.2 miles of mapped trail cross Roslyn Harbor, 1.8 per square mile of land. 169 acres are parks and preserves, 163 per 1,000 residents. 97% of residents live within a half mile of a park.
Ahead of 98% of U.S. towns. What drives it
Conserved land
22%
166 acres · of 1.2 sq mi of land
Trails
2.2 mi
1.8 per sq mi of land
Park land
169 ac
163 acres per 1,000 residents
Near a park
97%
of residents within ½ mile
Lakes & rivers
2
What kind of outdoors town is Roslyn Harbor?
Read from the map. The page puts what stands out first.
Land that stays wild22% of the land is conserved; a typical New York town, 5%.A trail town1.8 miles of mapped trail per square mile of land, more than 92% of U.S. towns.Room to roam163 acres of park per 1,000 residents; the typical U.S. town has 13.History along the way8 places on the National Register.
Outdoors grade
How much outdoors does Roslyn Harbor have?
On conserved land, trails, park land and how close residents live to a park, Roslyn Harbor is ahead of 98% of U.S. towns. All four inputs are above most U.S. towns; trail miles rank highest, the share of residents near a park lowest.
A+
OutdoorsA character grade: shown, never part of Roslyn Harbor’s overall grade.
Conserved land22% of the land · typical NY town 5% · U.S. 4%ATrails1.8 miles of mapped trail per square mile of land (2 mi) · NY 0.4 · U.S. 0.4APark land163 acres of park per 1,000 residents (169 acres) · NY 31 · U.S. 13AParks close to home97% of residents within a half mile of a park · NY 70% · U.S. 72%A−
All U.S. towns we grade (21,298)Ahead of 98%
LessMore
How sure. Graded on any three of the four inputs instead, the letter would still be 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 William Cullen Bryant Preserve, with 1.9 miles. Directions go to the nearest trailhead or public parking.
Nassau County Museum of Art
Park
47 acres0.2 mi of trail
Dog rules not recorded
Directionsto the parking lot
Cedarmere
Managed by Nassau County
9 acres0.1 mi of trail
Dog rules not recorded
No trailhead mapped yet
Roslyn Harbor Pond Park
Managed by Incorporated Village of Roslyn Harbor
1 acres
Dog rules not recorded
No trailhead mapped yet
Who protects it
166 conserved acres
22% of Roslyn Harbor’s land. Who manages Roslyn Harbor’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
County309 ac
Town or city1 ac
Local Park · 162 acLocal Recreation Area · 146 acLocal Resource Management Area · 2 ac
Good to know
Conserved doesn’t always mean open to visitors. Public access isn’t recorded for 2 of 5 parcels. The walks above are places people visit.
The biggest protected parcels
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| COUNTY OF NASSAU Land Local Park | County | 153 | Unknown |
| William Cullen Bryant County Preserve Local Recreation Area | County | 146 | Open |
| Cedarmere Local Park | County | 8 | Open |
| Nassau County Lands Local Resource Management Area | County | 2 | Open |
| INC VILLAGE OF ROSLYN HARBOR Land Local Park | Town or city | 1 | Unknown |
Things to do
1 places to go in Roslyn Harbor
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Playgrounds in Roslyn Harbor
Roslyn Harbor Village Playground
DirectionsTrails & water
2 lakes & rivers
Lakes & rivers tap for directions
Biking & sports
0.0 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
Courts & fields
14Tennis
2Basketball
Includes school and college facilities, which aren’t always open to the public.
When to get out
The best walking months in Roslyn Harbor: 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) | 9.5 | 10.6 | 11.8 | 13.2 | 14.4 | 15.1 | 14.8 | 13.8 | 12.4 | 11.0 | 9.8 | 9.3 |
| High (°F) | 40 | 42 | 49 | 60 | 70 | 79 | 85 | 83 | 76 | 65 | 54 | 45 |
| Rain (in) | 3.4 | 3.0 | 4.3 | 3.9 | 3.6 | 4.1 | 3.9 | 4.1 | 4.1 | 4.2 | 3.5 | 4.4 |
February is the driest month (3.0 in) and July the warmest (highs of 85 °F). 4.4 inches fall in December, the wettest month. The climate in Roslyn Harbor →
Next door
Roslyn Harbor and its neighbors
Tap a town to see its outdoors.
Oyster Bay172 miNorth Hempstead25 miOld Brookville2.8 miRoslyn Harbor2.2 miRoslyn0.2 miGlenwood Landing0.0 mi
| Town | Conserved of land | Trail mi per sq mi | Park acres per 1,000 | Near a park ½ mile | Outdoors |
|---|---|---|---|---|---|
| Roslyn Harbor | 22% | 1.8 | 163 | 97% | A+ |
| Roslyn | 6% | 0.3 | 12 | 99%+ | B+ |
| Glenwood Landing | — not graded: under 1,000 residents or part of its town | ||||
| North Hempstead | 7% | 0.5 | 10 | 99% | B+ |
| Oyster Bay | 21% | 1.7 | 26 | 96% | A+ |
| Old Brookville | 4% | 0.7 | 33 | 85% | A− |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Roslyn Harbor
Where can I hike in Roslyn Harbor?
The longest trail networks: William Cullen Bryant Preserve, 1.9 miles; Nassau County Museum of Art, 0.2 miles; Cedarmere, 0.1 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Roslyn Harbor is conserved land?
22% of its land, against a typical 5% for a New York town and 4% nationally (PAD-US). Conserved doesn’t always mean open to visitors: easements are usually private land.
Are dogs allowed on Roslyn Harbor’s trails?
William Cullen Bryant Preserve and Nassau County Museum of Art don’t have dog rules recorded on the map; check the signs at the trailhead.
Is there public land near Roslyn Harbor?
18,825 acres of parks and open public land lie inside Roslyn Harbor or within 10 miles of it (PAD-US), 169 of them inside the town line.
How much outdoors does Roslyn Harbor have?
Ahead of 98% of U.S. towns on the Outdoors grade. 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 Roslyn Harbor 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 →