Little Rocky Run Stream Valley Park
Managed by Fairfax County Park Authority
89 acres0.8 mi of trail
Rocky Run Stream Valley Trail
Dogs on leash
Directionsto the parking lot
Photo: Famartin · CC BY-SA 4.0AOutdoors
Outdoors in Greenbriar
13% of Greenbriar’s land is conserved, and virtually every resident lives within a half mile of a park
Virtually every resident lives within a half mile of a park. 13% of Greenbriar’s land is conserved, about 123 acres. The biggest trail networks: Little Rocky Run Stream Valley Park (0.8 mi).
Ahead of 90% of U.S. towns · #36 of 253 in Virginia. What drives it
Conserved land
13%
123 acres · of 1.6 sq mi of land
Trails
1.2 mi
0.8 per sq mi of land
Park land
125 ac
15 acres per 1,000 residents
Near a park
99%+
of residents within ½ mile
Bike routes
3.1 mi
1.3 mi lanes · 1.8 mi paths
Lakes & rivers
1
What kind of outdoors town is Greenbriar?
Read from the map. The page puts what stands out first.
Outdoors grade
How much outdoors does Greenbriar have?
On conserved land, trails, park land and how close residents live to a park, Greenbriar is ahead of 90% of U.S. towns, #36 of 253 in Virginia. All four inputs are above most U.S. towns; the share of residents near a park ranks highest, park acres per resident lowest.
A
OutdoorsA character grade: shown, never part of Greenbriar’s overall grade.
Conserved land13% of the land · typical VA town 4% · U.S. 4%A−Trails0.8 miles of mapped trail per square mile of land (1 mi) · VA 0.7 · U.S. 0.4B+Park land15 acres of park per 1,000 residents (125 acres) · VA 8 · U.S. 13BParks close to homeVirtually all residents within a half mile of a park · VA 76% · U.S. 72%A+
All U.S. towns we grade (21,298)Ahead of 90%
LessMore
Virginia towns of 2,500+ (253)Ahead of 86%
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 Little Rocky Run Stream Valley Park, with 0.8 miles. Directions go to the nearest trailhead or public parking.
Greenbriar Park
Managed by Fairfax County
38 acres0.1 mi of trail
Dog rules not recorded
Directionsto the parking lot
Greenbiar commons Park
Managed by Fairfax County Park Authority
4 acres
Dog rules not recorded
No trailhead mapped yet
Greenbriar Commons Park
Managed by Fairfax County Park Authority
4 acres
Dog rules not recorded
Directionsto the parking lot
Who protects it
123 conserved acres
13% of Greenbriar’s land. Who manages Greenbriar’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
County123 ac
Not recorded41 ac
Local Park · 163 ac
The biggest protected parcels
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Rocky Run Stream Valley Park Local Park | County | 82 | Open |
| Greenbriar City Park Local Park | Not recorded | 73 | Open |
| Greenbriar Commons Local Park | Not recorded | 9 | Open |
Things to do
9 places to go in Greenbriar
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Playgrounds in Greenbriar
Greenbriar Pool Infant Playground
DirectionsGreenbriar Pool Playground
DirectionsPlus 7 playgrounds without a name on the map. Tap “Show all on map” to see them.
Trails & water
1 named trail and 1 lakes & rivers
Named trails
Open to bikes · 1.0 miUnpaved · 1.2 mi
Rocky Run Stream Valley Trail0.7 mi
Lakes & rivers tap for directions
Biking & sports
3.1 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
1.3 mi
painted or protected bike lanes
1.8 mi
off-road bike paths
Rock Run TrailBike route
0.7 miCourts & fields
10Tennis
8Basketball
6Baseball
4Pickleball
3Soccer
2Softball
2Football
2Beach volleyball
Includes school and college facilities, which aren’t always open to the public.
When to get out
The best walking months in Greenbriar: April 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 | 9.5 |
| High (°F) | 43 | 46 | 55 | 66 | 74 | 83 | 87 | 85 | 79 | 67 | 56 | 47 |
| Rain (in) | 3.0 | 2.6 | 3.5 | 3.3 | 4.2 | 4.2 | 4.3 | 3.6 | 4.1 | 3.7 | 3.1 | 3.5 |
February is the driest month (2.6 in) and July the warmest (highs of 87 °F). 4.3 inches fall in July, the wettest month. Summer highs reach 87 °F, too hot for the outline. The climate in Greenbriar →
Next door
Greenbriar and its neighbors
Greenbriar has the second most mapped trails of the 3 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 |
|---|---|---|---|---|---|
| Greenbriar | 13% | 0.8 | 15 | 99%+ | A |
| Fair Lakes | 11% | 0.4 | 20 | 99%+ | A |
| Chantilly | 21% | 1.1 | 68 | 99%+ | A+ |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Greenbriar
Where can I hike in Greenbriar?
The longest trail networks: Little Rocky Run Stream Valley Park, 0.8 miles; Greenbriar Park, 0.1 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Greenbriar is conserved land?
13% of its land, against a typical 4% for a Virginia town and 4% nationally (PAD-US). Conserved doesn’t always mean open to visitors: easements are usually private land.
Are dogs allowed on Greenbriar’s trails?
OpenStreetMap records dogs as welcome at Little Rocky Run Stream Valley Park (on leash). For the rest, check the signs at the trailhead.
Where can I bike in Greenbriar?
3.1 miles of bike routes are on the map: 1.3 of painted or protected lanes and 1.8 of off-road paths. Named routes: Rock Run Trail.
Is there public land near Greenbriar?
22,249 acres of parks and open public land lie inside Greenbriar or within 10 miles of it (PAD-US), 125 of them inside the town line.
How much outdoors does Greenbriar have?
Ahead of 90% of U.S. towns on the Outdoors grade, #36 of 253 in Virginia. 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 Greenbriar 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 →