San Gabriel Mountains National Monument
Managed by United States Forest Service
3,184 acres9.8 mi of trail
Glendora Ridge MotorwayLower Monroe Truck TrailLower Monroe TrailJohnstone Peak Truck Trail+1
Dog rules not recorded
No trailhead mapped yet
Photo: jaymanuel · CC BY-SA 4.0AOutdoors
Outdoors in Glendora
33% of Glendora’s land is conserved: 4,123 acres
26 miles of mapped trail cross Glendora, 1.3 per square mile of land. The biggest trail networks: San Gabriel Mountains National Monument (9.8 mi), South Hills Wilderness Area (4.9 mi), Louie Pompei Memorial Sports Park (0.6 mi). 1,342 acres are parks and preserves, 26 per 1,000 residents.
Ahead of 93% of U.S. towns · #146 of 847 in California. What drives it
Conserved land
33%
4,123 acres · of 19.5 sq mi of land
Trails
26 mi
1.3 per sq mi of land
Park land
1,342 ac
26 acres per 1,000 residents
Near a park
85%
of residents within ½ mile
Bike routes
2.5 mi
1.9 mi lanes · 0.5 mi paths
Lakes & rivers
3
What kind of outdoors town is Glendora?
Read from the map. The page puts what stands out first.
Outdoors grade
How much outdoors does Glendora have?
On conserved land, trails, park land and how close residents live to a park, Glendora is ahead of 93% of U.S. towns, #146 of 847 in California. All four inputs are above most U.S. towns; conserved land ranks highest, the share of residents near a park lowest.
A
OutdoorsA character grade: shown, never part of Glendora’s overall grade.
Conserved land33% of the land · typical CA town 4% · U.S. 4%A+Trails1.3 miles of mapped trail per square mile of land (26 mi) · CA 0.9 · U.S. 0.4APark land26 acres of park per 1,000 residents (1,342 acres) · CA 5 · U.S. 13B+Parks close to home85% 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 93%
LessMore
California towns of 2,500+ (847)Ahead of 83%
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 San Gabriel Mountains National Monument, with 9.8 miles. Directions go to the nearest trailhead or public parking.
South Hills Wilderness Area
Managed by City of Glendora
302 acres4.9 mi of trail
South Hills Backbone TrailAlosta Canyon TrailToyon TrailWalnut Trail+1
Dog rules not recorded
Directionsto the parking lotWebsite ↗
Louie Pompei Memorial Sports Park
Park
16 acres0.6 mi of trail
Dog rules not recorded
Directionsto the parking lotWebsite ↗
All 15 parks & preserves
San Gabriel Mountains National Monument3,184 acres · 9.8 mi of trail · United States Forest Service
South Hills Wilderness Area302 acres · 4.9 mi of trail · City of Glendora
DirectionsLouie Pompei Memorial Sports Park16 acres · 0.6 mi of trail
DirectionsGladstone Park8 acres · 0.5 mi of trail
DirectionsFinkbiner Park12 acres · 0.3 mi of trail
DirectionsGlendora Arboretum2 acres · 0.2 mi of trail
Centennial Heritage Park2 acres · 0.2 mi of trail
DirectionsDawson Avenue Park6 acres · 0.1 mi of trail
South Hills City Park1 acres · 0.1 mi of trail · City of Glendora
DirectionsWillow Springs Park1 acres · 0.1 mi of trail
Angeles National Forest3,184 acres · United States Forest Service
Sandburg Middle School Park15 acres
Carlyle E. Linder Equestrian Park6 acres
George Manooshian Park6 acres
Ole Hammer Park2 acres
Who protects it
4,123 conserved acres
33% of Glendora’s land. Who manages Glendora’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
U.S. Forest Service2,496 ac
Town or city1,436 ac
Land trusts & nonprofits175 ac
State fish & wildlife17 ac
National Forest · 2,496 acLocal Conservation Area · 1,178 acPrivate Conservation · 175 acLocal Other or Unknown · 151 acLocal Park · 82 ac
Good to know
Conserved doesn’t always mean open to visitors. 17 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 |
|---|---|---|---|
| Angeles National Forest National Forest | U.S. Forest Service | 2,493 | Open |
| Big Dalton Wilderness Park Local Conservation Area | Town or city | 777 | Open |
| South Hills Wilderness Area Local Conservation Area | Town or city | 290 | Open |
| Brodiaea Reserve Private Conservation | Land trusts & nonprofits | 175 | Open |
| Unnamed site - Pasadena, City of Local Other or Unknown | Town or city | 151 | Open |
| Bluebird Preserve Local Conservation Area | Town or city | 68 | Closed |
| Gordon Mull Preserve Local Conservation Area | Town or city | 42 | Open |
| George Manooshian Park Local Park | Town or city | 19 | Restricted |
| Louie Pompei Memorial Sports Park Local Recreation Area | Town or city | 18 | Open |
| Glenoaks Golf Course and Park Local Park | Town or city | 17 | Restricted |
5 smaller protected places aren’t shown.
Things to do
20 places to go in Glendora
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Playgrounds in Glendora
12 playgrounds without a name on the map. Tap “Show all on map” to see them.
Dog parks in Glendora
1 dog park without a name on the map. Tap “Show all on map” to see it.
Picnic areas in Glendora
Site AIn Gladstone Park
DirectionsSite BIn Gladstone Park
DirectionsSite CIn Gladstone Park
DirectionsSite DIn Gladstone Park
DirectionsSite EIn Gladstone Park
DirectionsPlus 1 picnic area without a name on the map.
Campgrounds in Glendora
Big Dalton CampgroundHours: sunrise-sunset
DirectionsTrails & water
25 named trails and 3 lakes & rivers
Named trails
Open to bikes · 10.6 miHorses · 7.6 miUnpaved · 13.1 mi
Glendora Ridge Motorway3.3 mi
Lower Monroe Truck Trail2.5 mi
Lower Monroe Trail1.8 mi
Open Door Trail1.0 mi
Wren Meacham Trail0.9 mi
Johnstone Peak Truck Trail0.8 mi
South Hills Backbone Trail0.8 mi
South Hills Motorway0.6 mi
Colby Trail0.6 mi
Alosta Canyon Trail0.6 mi
15 more trails
Colby-Dalton Trail
0.5 miBig Dalton Canyon Trail
0.5 miToyon Trail
0.5 miWalnut Trail
0.4 miColby Dalton Trail
0.4 miUpper Colby Trail
0.4 miBonnie Cove East Trail
0.3 miBonnie Cove West Trail
0.3 miAlosta Canyon South Fork Trail
0.3 miNorth Spur Trail
0.3 miBig Dalton Wash Trail
0.3 miMystic Canyon Trail
0.3 miEast View South Fork Trail
0.3 miMustard Trail
0.2 miEast View North Fork Trail
0.2 miLakes & rivers tap for directions
Biking & sports
2.5 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
1.9 mi
painted or protected bike lanes
0.5 mi
off-road bike paths
0.1 mi
shoulders & shared lanes
Courts & fields
37Tennis
16Baseball
9Basketball
6Softball
5Soccer
3Football
2Volleyball
2Equestrian
Includes school and college facilities, which aren’t always open to the public.
History along the way
History →2 places on the National Register
The country’s official list of places worth saving (National Park Service).
When to get out
The best walking months in Glendora: 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) | 10.1 | 10.9 | 11.9 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.3 | 11.3 | 10.3 | 9.9 |
| High (°F) | 67 | 68 | 71 | 75 | 78 | 84 | 91 | 92 | 89 | 81 | 73 | 66 |
| Rain (in) | 4.6 | 5.0 | 3.0 | 1.1 | 0.5 | 0.1 | 0.0 | 0.0 | 0.2 | 0.8 | 1.2 | 3.1 |
August is the driest month (under 0.1 in) and the warmest (highs of 92 °F). 5.0 inches fall in February, the wettest month. Summer highs reach 92 °F, too hot for the outline. The climate in Glendora →
Next door
Glendora and its neighbors
Glendora has the second most mapped trails of the 6 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 |
|---|---|---|---|---|---|
| Glendora | 33% | 1.3 | 26 | 85% | A |
| Azusa | 5% | 0.7 | 6 | 93% | B+ |
| San Dimas | 37% | 2.9 | 66 | 93% | A+ |
| Citrus | 1% | 0.5 | under 1 | 73% | C |
| Charter Oak | 2% | 0.4 | 1 | 81% | C+ |
| Covina | 2% | 0.6 | 2 | 86% | B− |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Glendora
Where can I hike in Glendora?
The longest trail networks: San Gabriel Mountains National Monument, 9.8 miles; South Hills Wilderness Area, 4.9 miles; Louie Pompei Memorial Sports Park, 0.6 miles; Gladstone Park, 0.5 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Glendora is conserved land?
33% 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 Glendora’s trails?
San Gabriel Mountains National Monument and South Hills Wilderness Area don’t have dog rules recorded on the map; check the signs at the trailhead.
Where can I bike in Glendora?
2.5 miles of bike routes are on the map: 1.9 of painted or protected lanes, 0.5 of off-road paths and 0.1 of shoulders and shared lanes.
Is there public land near Glendora?
22,732 acres of parks and open public land lie inside Glendora or within 10 miles of it (PAD-US), 1,346 of them inside the city line.
How much outdoors does Glendora have?
Ahead of 93% of U.S. towns on the Outdoors grade, #146 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 Glendora 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 →