San Joaquin Marsh Reserve
Managed by University of California Natural Reserve System
515 acres8.5 mi of trail
South Loop TrailTreehil TrailThe MidwayWillow Path+1
No dogs
Directionsto San Joaquin Wildlife Sanctuary Parking LotWebsite ↗
Photo: Azusa Tarn · CC BY-SA 4.0AOutdoors
Outdoors in Irvine
22% of Irvine’s land is conserved, and 99% of residents live within a half mile of a park
123 miles of mapped trail cross Irvine, 1.9 per square mile of land. 22% of Irvine’s land is conserved, about 9,202 acres. The biggest trail networks: San Joaquin Marsh Reserve (8.5 mi), Bommer Canyon Open Space Preserve (4.8 mi), Shady Canyon Open Space Preserve (3.4 mi).
Ahead of 94% of U.S. towns · #134 of 847 in California. What drives it
Conserved land
22%
9,202 acres · of 65.6 sq mi of land
Trails
123 mi
1.9 per sq mi of land
Park land
3,887 ac
12 acres per 1,000 residents
Near a park
99%
of residents within ½ mile
Bike routes
413 mi
259 mi lanes · 152 mi paths
Highest peak
427 ft
French Hill
Lakes & rivers
18
What kind of outdoors town is Irvine?
Read from the map. The page puts what stands out first.
Outdoors grade
How much outdoors does Irvine have?
On conserved land, trails, park land and how close residents live to a park, Irvine is ahead of 94% of U.S. towns, #134 of 847 in California. 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 Irvine’s overall grade.
Conserved land22% of the land · typical CA town 4% · U.S. 4%ATrails1.9 miles of mapped trail per square mile of land (123 mi) · CA 0.9 · U.S. 0.4APark land12 acres of park per 1,000 residents (3,887 acres) · CA 5 · U.S. 13B−Parks close to home99% of residents within a half mile of a park · CA 91% · U.S. 72%A
All U.S. towns we grade (21,298)Ahead of 94%
LessMore
California towns of 2,500+ (847)Ahead of 84%
Among the 400 U.S. cities of 100,000 or more, Irvine ranks #40 on Outdoors.
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 San Joaquin Marsh Reserve, with 8.5 miles. Directions go to the nearest trailhead or public parking.
Bommer Canyon Open Space Preserve
Managed by Irvine Ranch Conservancy
918 acres4.8 mi of trail
Turtle Ridge TrailWest Fork TrailNature LoopBommer Pass+1
No dogs
Directionsto the parking lotWebsite ↗
Shady Canyon Open Space Preserve
Managed by Irvine Ranch Conservancy
1,721 acres3.4 mi of trail
Serrano Ridge TrailWest Canyon TrailQuail Trail
Dog rules not recorded
Directionsto the parking lotWebsite ↗
Great Park Sports Complex
Managed by City of Irvine
236 acres3.4 mi of trail
Championship Row
Dog rules not recorded
Directionsto P1
Quail Hill Open Space Preserve
Managed by Irvine Ranch Conservancy
742 acres2.7 mi of trail
Quail Hill Loop TrailQuail TrailShady Canyon Trail
Dogs on leash
Directionsto the parking lotWebsite ↗
Bill Barber Memorial Park
Managed by City of Irvine
37 acres2.3 mi of trail
Dog rules not recorded
Directionsto Event Parking
Heritage Park
Managed by City of Tustin
37 acres1.6 mi of trail
Dog rules not recorded
Directionsto the parking lot
All 215 parks & preserves
San Joaquin Marsh Reserve515 acres · 8.5 mi of trail · University of California Natural Reserve System
DirectionsBommer Canyon Open Space Preserve918 acres · 4.8 mi of trail · Irvine Ranch Conservancy
DirectionsShady Canyon Open Space Preserve1,721 acres · 3.4 mi of trail · Irvine Ranch Conservancy
DirectionsGreat Park Sports Complex236 acres · 3.4 mi of trail · City of Irvine
DirectionsQuail Hill Open Space Preserve742 acres · 2.7 mi of trail · Irvine Ranch Conservancy
DirectionsBill Barber Memorial Park37 acres · 2.3 mi of trail · City of Irvine
DirectionsBosque Canyon59 acres · 1.8 mi of trail
DirectionsHeritage Park37 acres · 1.6 mi of trail · City of Tustin
DirectionsJeffrey Open Space Trail72 acres · 1.3 mi of trail
DirectionsVeeh Creek Open Space316 acres · 1.2 mi of trail · Irvine Ranch Conservancy
Luna Park13 acres · 1.2 mi of trail
DirectionsWilliam R. Mason Regional Park (wilderness area)120 acres · 0.9 mi of trail
DirectionsQuail Hill Community Park17 acres · 0.8 mi of trail
DirectionsSweet Shade Park9 acres · 0.8 mi of trail
DirectionsTurtle Rock Community Park20 acres · 0.7 mi of trail · City of Irvine
DirectionsUniversity Community Park15 acres · 0.6 mi of trail
DirectionsLos Olivos Community Park13 acres · 0.6 mi of trail
DirectionsThe Pools9 acres · 0.6 mi of trail
DirectionsIrvine Ranch Historic Park17 acres · 0.5 mi of trail
DirectionsMeadowood Park11 acres · 0.5 mi of trail
DirectionsSettlers Park7 acres · 0.5 mi of trail · City of Irvine
DirectionsSky Park Circle Park5 acres · 0.5 mi of trail
DirectionsHarvard Square Park4 acres · 0.5 mi of trail
Harvard Athletic Park28 acres · 0.4 mi of trail
DirectionsWoodbridge Community Park23 acres · 0.4 mi of trail
DirectionsCypress Grove Park9 acres · 0.4 mi of trail
DirectionsCadence Park7 acres · 0.4 mi of trail
DirectionsDovecreek Park7 acres · 0.4 mi of trail
DirectionsSycamore Park6 acres · 0.4 mi of trail
Eastwood Neighborhood Park6 acres · 0.4 mi of trail
DirectionsArbor Park6 acres · 0.4 mi of trail
DirectionsThe Meadows Park4 acres · 0.4 mi of trail
Mason Regional Park101 acres · 0.3 mi of trail · OC Parks
DirectionsPortola Springs Community Park35 acres · 0.3 mi of trail · City of Irvine
DirectionsNorthwood Community Park17 acres · 0.3 mi of trail
DirectionsPlaza Park8 acres · 0.3 mi of trail
DirectionsCascade Park8 acres · 0.3 mi of trail
DirectionsValencia Park6 acres · 0.3 mi of trail
DirectionsVillage Square Park4 acres · 0.3 mi of trail
DirectionsRoyal Oak Park4 acres · 0.3 mi of trail
DirectionsPepperwood Park4 acres · 0.3 mi of trail
Culverwood Wilderness Park3 acres · 0.3 mi of trail
Blue Gum Park3 acres · 0.3 mi of trail
Arrowhead Park3 acres · 0.3 mi of trail
DirectionsValley View Park9 acres · 0.2 mi of trail
Brywood Park6 acres · 0.2 mi of trail · City of Irvine
DirectionsCoralwood Park6 acres · 0.2 mi of trail
DirectionsVista Bonita Park5 acres · 0.2 mi of trail · ICHA
DirectionsDave Robins Park5 acres · 0.2 mi of trail
DirectionsGabrielino Park4 acres · 0.2 mi of trail · ICHA
DirectionsLos Trancos Recreation Area4 acres · 0.2 mi of trail · ICHA
DirectionsGreentree school park4 acres · 0.2 mi of trail
DirectionsHighland Park4 acres · 0.2 mi of trail
DirectionsSolis Park3 acres · 0.2 mi of trail
DirectionsCarrotwood Park3 acres · 0.2 mi of trail
Presley Park3 acres · 0.2 mi of trail
DirectionsEucalyptus Park3 acres · 0.2 mi of trail
DirectionsRavencreek Park3 acres · 0.2 mi of trail
DirectionsPlateau Park3 acres · 0.2 mi of trail
DirectionsThe Commons3 acres · 0.2 mi of trail
Springacre Park2 acres · 0.2 mi of trail
DirectionsGrand Trellis Park2 acres · 0.2 mi of trail
DirectionsPeppergrass Park2 acres · 0.2 mi of trail
DirectionsAshwood Park2 acres · 0.2 mi of trail
Las Lomas Community Park17 acres · 0.1 mi of trail
DirectionsCypress Community Park17 acres · 0.1 mi of trail
DirectionsHicks Canyon Community Park16 acres · 0.1 mi of trail
DirectionsAldrich Park15 acres · 0.1 mi of trail · University of California, Irvine
DirectionsMark Daily Athletic Park9 acres · 0.1 mi of trail · City of Irvine
DirectionsSouth Lake Park8 acres · 0.1 mi of trail
DirectionsHoeptner Park8 acres · 0.1 mi of trail
DirectionsRanch Park7 acres · 0.1 mi of trail
DirectionsSan Carlo Park5 acres · 0.1 mi of trail
DirectionsThe Promenade4 acres · 0.1 mi of trail
DirectionsSan Leandro Park4 acres · 0.1 mi of trail · City of Irvine
DirectionsCanyon Park4 acres · 0.1 mi of trail
San Paulo Park3 acres · 0.1 mi of trail
DirectionsNorthpark Square3 acres · 0.1 mi of trail
DirectionsCitrusglen Park3 acres · 0.1 mi of trail
DirectionsCornell Commons3 acres · 0.1 mi of trail
DirectionsMosaic Park3 acres · 0.1 mi of trail
DirectionsSan Mateo Park3 acres · 0.1 mi of trail
Columbia Square3 acres · 0.1 mi of trail
DirectionsPrinceton Park3 acres · 0.1 mi of trail
DirectionsGreenfield Park3 acres · 0.1 mi of trail
DirectionsForest Glen Park2 acres · 0.1 mi of trail
DirectionsStanford Park2 acres · 0.1 mi of trail
DirectionsTimber Run Park2 acres · 0.1 mi of trail
Crestbrook Park2 acres · 0.1 mi of trail
DirectionsRacquet Club Park2 acres · 0.1 mi of trail
DirectionsMeadow Valley Park2 acres · 0.1 mi of trail
Echo Run Park2 acres · 0.1 mi of trail
DirectionsShorebird Park2 acres · 0.1 mi of trail
Homestead Park2 acres · 0.1 mi of trail
DirectionsNorthwood Courtside Park2 acres · 0.1 mi of trail
DirectionsHideaway Park2 acres · 0.1 mi of trail
Woodland Garden Park1 acres · 0.1 mi of trail
Monarch Park at Portola Springs1 acres · 0.1 mi of trail
DirectionsPasadena Gardens1 acres · 0.1 mi of trail
San Marino Gardens1 acres · 0.1 mi of trail
Treetop Park1 acres · 0.1 mi of trail
Five Point Pop-up Park1 acres · 0.1 mi of trail · Five Point
Clearbrook Park27 acres
DirectionsWindrow Athletic Community Park19 acres
DirectionsOak Creek Community Park11 acres
DirectionsUCI Arboretum11 acres
DirectionsDeerfield Community Park10 acres · City of Irvine
Woodbury Community Park10 acres
DirectionsDavid Sills Lower Peters Canyon Park10 acres
DirectionsSilkwood Park10 acres
DirectionsWoodbury Rec Center8 acres
DirectionsCollege Park8 acres
DirectionsKnollcrest Park8 acres
DirectionsPavilion Park8 acres
DirectionsLaguna Coast Wilderness Park6 acres · Orange County Parks
Orchard Park6 acres
DirectionsChaparral Park6 acres · City of Irvine
Stonegate Park5 acres
DirectionsCulverdale Wilderness Park5 acres
DirectionsSan Marcos Park5 acres
DirectionsNorth Lake Park5 acres
DirectionsWoodflower Park5 acres · Woodbridge Village Association
DirectionsFloral Park5 acres
DirectionsTurtle Rock Ridge Park5 acres
DirectionsMeadow Park5 acres · ICHA
DirectionsCharles D. Bren Memorial Park4 acres
DirectionsSwallows Park4 acres
DirectionsLomas Valley Park4 acres
The Park4 acres
San Marino Park3 acres
DirectionsEgret Park3 acres
DirectionsSilverado Park3 acres
The Groves3 acres
DirectionsNovel Park3 acres
DirectionsSunridge Park3 acres
DirectionsTrailside Park3 acres
Parasol Park3 acres
Hidden Canyon Recreation Center3 acres
Willows Park3 acres
Mountain View Park2 acres
DirectionsPepper Tree Park2 acres
Valley Oak Park2 acres
DirectionsMockingbird Park2 acres
DirectionsOrangetree Park2 acres
Stone Creek Swim Club2 acres · Woodbridge Village Association
DirectionsFlagstone Park2 acres
Briarglen Park2 acres
DirectionsSmokestone Park2 acres
Windjammer Park2 acres
Woodpine Park2 acres
Paseo Park2 acres
DirectionsFirwood Park2 acres
DirectionsSepulveda Vista Point2 acres
DirectionsTurtle Rock Silkwood Park2 acres
DirectionsPinewood Park2 acres
DirectionsWildwood Park2 acres
DirectionsGarden Center Park2 acres
DirectionsSierra Bravo Park2 acres
DirectionsRound Canyon Park2 acres
DirectionsDaybreak Park2 acres
Sierra Boca Park2 acres
Central Park at Los Olivos2 acres
Sierra Amigo Park2 acres
Orchard Trail Park2 acres
Sierra Oro Park2 acres
Wintermist2 acres
DirectionsPromenade Square Park2 acres
DirectionsGateway Park2 acres
DirectionsThe Retreat2 acres
DirectionsBluebird Park2 acres
Turtle Rock Crest Park2 acres
DirectionsThe Lakes2 acres
DirectionsCrestwood Park2 acres
DirectionsPaseo Segovia Park2 acres
DirectionsBirdsong Park1 acres
DirectionsAltair Park1 acres
DirectionsWindwood Park1 acres
DirectionsOlive Grove Square Park1 acres
Grossmont Park1 acres
DirectionsWoodside Park1 acres
Travata Park1 acres
DirectionsLemongrass Park1 acres
DirectionsDate Palm Park1 acres
Laurel Square Park1 acres
DirectionsGoldfinch Park1 acres
DirectionsCanyon Creek Park1 acres
Northwood Glen1 acres
Sausalito Gardens1 acres
DirectionsBluejay Park1 acres
DirectionsGarden Point Park1 acres
DirectionsSpringbrook Park1 acres
Meadowlark Park1 acres
DirectionsPine Brook Park1 acres
Orchard View Park1 acres
Tomato Springs Park1 acres
Lower Peters Canyon Park1 acres
Terrace Garden Park1 acres
Doe Trail Park1 acres · HOA
Magnolia Square Park1 acres
DirectionsRidgeview Park1 acres
Cypress Square Pool Park1 acres
Coral Tree Square Park1 acres
Discovery Park1 acres
The Springs1 acres
DirectionsBel Air Gardens1 acres
Del Mar Gardens1 acres
Ridgetop Park1 acres
Alderwood Park1 acres
Coronado Gardens1 acres
Coltrane Corner Park1 acres · ICHA
DirectionsVista Filare 11 acres
Elm Street Pool1 acres
DirectionsPalm Park1 acres
205 Novel1 acres
Hidden Park1 acres
DirectionsWho protects it
9,202 conserved acres
22% of Irvine’s land. Who manages Irvine’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
Land trusts & nonprofits3,699 ac
Town or city2,643 ac
County2,184 ac
Private owners429 ac
Other state land345 ac
State fish & wildlife126 ac
Regional agency2 ac
Private Other or Unknown · 3,711 acLocal Park · 2,855 acLocal Recreation Area · 823 acLocal Other or Unknown · 671 acLocal Conservation Area · 342 ac
Good to know
Conserved doesn’t always mean open to visitors. 124 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 |
|---|---|---|---|
| South-Shady Canyon Open Space Preserve Private Other or Unknown | Land trusts & nonprofits | 1,724 | Open |
| Orange County Great Park Local Park | County | 1,307 | Restricted |
| South-Bommer Canyon Open Space Preserve Private Other or Unknown | Land trusts & nonprofits | 918 | Open |
| South-Quail Hill Open Space Preserve Private Other or Unknown | Land trusts & nonprofits | 732 | Open |
| William R Mason Regional Park Local Park | County | 435 | Open |
| Veeh Creek Private Other or Unknown | Land trusts & nonprofits | 309 | Closed |
| San Joaquin Freshwater Marsh Reserve Local Conservation Area | County | 305 | Restricted |
| San Diego Creek & Bike Path Local Recreation Area | Town or city | 276 | Open |
| Gateway Park Reserve Private Park | Town or city | 273 | Open |
| San Joaquin Marsh Reserve State Conservation Area | Other state land | 198 | Restricted |
5 smaller protected places aren’t shown.
Things to do
333 places to go in Irvine
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Public pools in Irvine
Competition Pool
DirectionsCrawford Pool
DirectionsDive Pool
DirectionsJacuzzi
DirectionsSierra Ridge PoolIn Sierra Bravo Park
DirectionsVista del Campo Pool
DirectionsspaIn Trailside Park
DirectionsPlus 3 public pools without a name on the map. Tap “Show all on map” to see them.
Playgrounds in Irvine
Adventure PlaygroundIn University Community Park
DirectionsAdventure PlaygroundIn University Community Park
DirectionsForest Glen PlaygroundIn Forest Glen Park
DirectionsKids RockIn Great Park Sports Complex
DirectionsMontecito Gardens Playground
DirectionsSausalito Gardens PlaygroundIn Sausalito Gardens
DirectionsTot Lot PlaygroundIn Deerfield Community Park
Directions279 playgrounds are on OpenStreetMap in all; the list shows named ones from the first 30.
Dog parks in Irvine
Irvine Central Bark
DirectionsNovel Park Dog ParkIn Novel Park
DirectionsThe Park Dog ParkIn The Park
DirectionsPlus 7 dog parks without a name on the map.
Scenic views in Irvine
Plus 6 scenic views without a name on the map.
Peaks in Irvine
French Hill427 ft elevation
DirectionsCommunity gardens in Irvine
1 community garden without a name on the map. Tap “Show all on map” to see it.
Trails & water
25 named trails and 18 lakes & rivers
Named trails
Open to bikes · 24.2 miHorses · 16.1 miUnpaved · 46.0 mi
Shady Canyon Trail2.5 mi
Quail Trail2.0 mi
Turtle Ridge Trail2.0 mi
Hicks Canyon Trail1.8 mi
Quail Hill Loop Trail1.7 mi
Serrano Ridge Trail1.6 mi
South Loop Trail1.4 mi
Jeffrey Open Space Trail1.1 mi
Peters Canyon Hiking & Riding Trail1.0 mi
West Canyon Trail0.9 mi
15 more trails
Jogging Trail
0.8 miTreehil Trail
0.8 miWest Irvine Trail
0.8 miWest Fork Trail
0.7 miSunset Point Trail
0.7 miNature Loop
0.6 miPeters Canyon Trail
0.6 miBommer Pass
0.5 miCommunity Trail
0.4 miBommer Meadow
0.4 miBommer Meadow Trail
0.4 miThe Midway
0.3 miDirt
0.3 miGreentree track
0.2 miSand Canyon Wash Trail
0.2 miBiking & sports
413 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
259 mi
painted or protected bike lanes
152 mi
off-road bike paths
2.0 mi
shoulders & shared lanes
Jeffrey TrailBike route
0.3 miCourts & fields
314Tennis
247Basketball
95Pickleball
88Baseball
86Soccer
55Beach volleyball
28Tracks
18Volleyball
Includes school and college facilities, which aren’t always open to the public.
History along the way
History →3 places on the National Register
The country’s official list of places worth saving (National Park Service). The map also marks 20 historic points from OpenStreetMap: plaques, memorials and old buildings.
When to get out
The best walking months in Irvine: April to 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) | 10.1 | 10.9 | 11.9 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.3 | 11.3 | 10.4 | 9.9 |
| High (°F) | 69 | 69 | 70 | 73 | 75 | 78 | 83 | 85 | 84 | 80 | 74 | 69 |
| Rain (in) | 2.8 | 3.1 | 1.8 | 0.8 | 0.3 | 0.1 | 0.0 | 0.0 | 0.1 | 0.5 | 0.8 | 2.1 |
August is the driest month (under 0.1 in) and the warmest (highs of 85 °F). 3.1 inches fall in February, the wettest month. The climate in Irvine →
Next door
Irvine and its neighbors
Irvine has the most mapped trails of the 8 towns around it. Tap a town to see its outdoors.
Irvine123 miNewport Beach41 miLake Forest41 miTustin20 miCosta Mesa19 miSanta Ana16 miLaguna Hills13 miLaguna Woods3.9 mi
| Town | Conserved of land | Trail mi per sq mi | Park acres per 1,000 | Near a park ½ mile | Outdoors |
|---|---|---|---|---|---|
| Irvine | 22% | 1.9 | 12 | 99% | A |
| Tustin | 4% | 1.8 | 4 | 97% | B+ |
| Newport Beach | 19% | 1.7 | 35 | 99% | A+ |
| Lake Forest | 20% | 2.5 | 26 | 99%+ | A+ |
| Santa Ana | 4% | 0.6 | 2 | 96% | B |
| Laguna Woods | 13% | 1.2 | 8 | 95% | A− |
| Laguna Hills | 3% | 2.0 | 6 | 99%+ | A− |
| Costa Mesa | 9% | 1.2 | 7 | 96% | A− |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Irvine
Where can I hike in Irvine?
The longest trail networks: San Joaquin Marsh Reserve, 8.5 miles; Bommer Canyon Open Space Preserve, 4.8 miles; Shady Canyon Open Space Preserve, 3.4 miles; Great Park Sports Complex, 3.4 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Irvine is conserved land?
22% 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 Irvine’s trails?
OpenStreetMap records dogs as welcome at Quail Hill Open Space Preserve (on leash). For the rest, check the signs at the trailhead.
Where can I bike in Irvine?
413 miles of bike routes are on the map: 259 of painted or protected lanes, 152 of off-road paths and 2.0 of shoulders and shared lanes. Named routes: Jeffrey Trail.
Is there public land near Irvine?
83,049 acres of parks and open public land lie inside Irvine or within 10 miles of it (PAD-US), 3,887 of them inside the city line.
How much outdoors does Irvine have?
Ahead of 94% of U.S. towns on the Outdoors grade, #134 of 847 in California. 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 Irvine 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 →