Patwino Worrtla Kodoi Dihi Open Space Park
Managed by Solano Land Trust
1,243 acres12.4 mi of trail
Mule LoopDoris Klein Ridge TrailHarmonia TrailBalbalihk+1
No dogs
Directionsto the trail sign
A+Outdoors
Outdoors in Green Valley
Green Valley has 29 miles of mapped trails, 3.5 for every square mile of land
1,490 acres are parks and preserves, 1,092 per 1,000 residents. 41% of Green Valley’s land is conserved, about 2,209 acres. The biggest trail networks: Patwino Worrtla Kodoi Dihi Open Space Park (12.4 mi), Rockville Hills Regional Park (8.8 mi).
Ahead of 96% of U.S. towns. What drives it
Conserved land
41%
2,209 acres · of 8.4 sq mi of land
Trails
29 mi
3.5 per sq mi of land
Park land
1,490 ac
1,092 acres per 1,000 residents
Near a park
55%
of residents within ½ mile
Bike routes
1.3 mi
1.3 mi paths
What kind of outdoors town is Green Valley?
Read from the map. The page puts what stands out first.
Outdoors grade
How much outdoors does Green Valley have?
On conserved land, trails, park land and how close residents live to a park, Green Valley is ahead of 96% of U.S. towns. Trail miles hold the grade up; the share of residents near a park pulls it down.
A+
OutdoorsA character grade: shown, never part of Green Valley’s overall grade.
Conserved land41% of the land · typical CA town 4% · U.S. 4%A+Trails3.5 miles of mapped trail per square mile of land (29 mi) · CA 0.9 · U.S. 0.4A+Park land1,092 acres of park per 1,000 residents (1,490 acres) · CA 5 · U.S. 13A+Parks close to home55% of residents within a half mile of a park · CA 91% · U.S. 72%B−
All U.S. towns we grade (21,298)Ahead of 96%
LessMore
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 Patwino Worrtla Kodoi Dihi Open Space Park, with 12.4 miles. Directions go to the nearest trailhead or public parking.
Rockville Hills Regional Park
Managed by City of Fairfield
228 acres8.8 mi of trail
Unknown TrailOutside LoopArch TrailMiddle Mystic+1
Dog rules not recorded
No trailhead mapped yetWebsite ↗
Who protects it
2,209 conserved acres
41% of Green Valley’s land. Who manages Green Valley’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
Land trusts & nonprofits1,269 ac
Town or city940 ac
Private Recreation or Education · 1,249 acLocal Other or Unknown · 709 acLocal Park · 231 acUnknown Easement · 20 ac
Good to know
Conserved doesn’t always mean open to visitors. 20 acres are conservation easements, usually private land. The walks above are places people visit.
The biggest protected parcels
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Patwino Worrtla Kodoi Dihi Open Space Park Private Recreation or Education | Land trusts & nonprofits | 1,249 | Restricted |
| Vallejo Lakes Local Other or Unknown | Town or city | 709 | Closed |
| Rockville Hills Regional Park Local Park | Town or city | 231 | Open |
Things to do
4 places to go in Green Valley
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Scenic views in Green Valley
1 scenic view without a name on the map. Tap “Show all on map” to see it.
Picnic areas in Green Valley
3 picnic areas without a name on the map. Tap “Show all on map” to see them.
Trails & water
25 named trails
Named trails
Open to bikes · 0.6 miUnpaved · 4.5 mi
Mule Loop2.3 mi
Doris Klein Ridge Trail1.8 mi
Unknown Trail1.5 mi
Harmonia Trail1.1 mi
Balbalihk0.7 mi
Waka0.7 mi
Tarrat Loop0.7 mi
Outside Loop0.6 mi
Arch Trail0.5 mi
Middle Mystic0.5 mi
15 more trails
Upper Mystic
0.4 miMay-December
0.4 miNop
0.4 miHeartland Trail
0.3 miSul Trail
0.3 miFern Falls
0.3 miJockey Junction
0.3 miLower Mystic
0.3 miOverlook
0.3 miMystic Ridge
0.2 miCoyote Track
0.2 miCliff View
0.2 miBay Area Ridge Trail
0.2 miLower Unknown Trail
0.2 miRock Garden
0.1 miBiking & sports
1.3 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
1.3 mi
off-road bike paths
Courts & fields
14Tennis
3Equestrian
1Basketball
Includes school and college facilities, which aren’t always open to the public.
When to get out
The best walking months in Green Valley: April to June
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) | 9.8 | 10.7 | 11.8 | 13.1 | 14.2 | 14.8 | 14.6 | 13.6 | 12.4 | 11.1 | 10.0 | 9.5 |
| High (°F) | 57 | 61 | 66 | 70 | 77 | 84 | 88 | 88 | 86 | 77 | 65 | 56 |
| Rain (in) | 5.1 | 5.0 | 3.7 | 1.6 | 0.9 | 0.2 | 0.0 | 0.1 | 0.1 | 1.2 | 2.6 | 5.4 |
July is the driest month (under 0.1 in) and August the warmest (highs of 88 °F). 5.4 inches fall in December, the wettest month. Summer highs reach 88 °F, too hot for the outline. The climate in Green Valley →
Next door
Green Valley and its neighbors
Green Valley has the second most mapped trails of the 2 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 |
|---|---|---|---|---|---|
| Green Valley | 41% | 3.5 | 1,092 | 55% | A+ |
| Fairfield | 9% | 0.8 | 14 | 92% | A− |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Green Valley
Where can I hike in Green Valley?
The longest trail networks: Patwino Worrtla Kodoi Dihi Open Space Park, 12.4 miles; Rockville Hills Regional Park, 8.8 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Green Valley is conserved land?
41% of its land, against a typical 4% for a California town and 4% nationally (PAD-US). Conserved doesn’t always mean open to visitors: easements are usually private land.
Are dogs allowed on Green Valley’s trails?
Patwino Worrtla Kodoi Dihi Open Space Park and Rockville Hills Regional Park don’t have dog rules recorded on the map; check the signs at the trailhead.
Where can I bike in Green Valley?
1.3 miles of bike routes are on the map: 1.3 of off-road paths.
Is there public land near Green Valley?
28,472 acres of parks and open public land lie inside Green Valley or within 10 miles of it (PAD-US), 1,490 of them inside the town line.
How much outdoors does Green Valley have?
Ahead of 96% 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 Green Valley 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 →