Sycamore Canyon Park
Park
48 acres0.8 mi of trail
Dog rules not recorded
Directionsto the parking lotWebsite ↗
Photo: Thebluewriter · CC BY-SA 4.0B−Outdoors
Outdoors in Diamond Bar
Diamond Bar has 7.0 miles of mapped trails, 0.5 for every square mile of land
The biggest trail networks: Sycamore Canyon Park (0.8 mi), Diamond Canyon Park (0.7 mi). 193 acres are parks and preserves, 3.6 per 1,000 residents. 76% of residents live within a half mile of a park.
Ahead of 51% of U.S. towns · #527 of 847 in California. What drives it
Conserved land
4%
403 acres · of 14.9 sq mi of land
Trails
7.0 mi
0.5 per sq mi of land
Park land
193 ac
3.6 acres per 1,000 residents
Near a park
76%
of residents within ½ mile
Bike routes
22 mi
22 mi lanes
Outdoors grade
How much outdoors does Diamond Bar have?
On conserved land, trails, park land and how close residents live to a park, Diamond Bar is ahead of 51% of U.S. towns, #527 of 847 in California. Trail miles hold the grade up; park acres per resident pull it down.
B−
OutdoorsA character grade: shown, never part of Diamond Bar’s overall grade.
Conserved land4% of the land · typical CA town 4% · U.S. 4%BTrails0.5 miles of mapped trail per square mile of land (7 mi) · CA 0.9 · U.S. 0.4BPark land3.6 acres of park per 1,000 residents (193 acres) · CA 5 · U.S. 13CParks close to home76% 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 51%
LessMore
California towns of 2,500+ (847)Ahead of 38%
How sure. Graded on any three of the four inputs instead, the letter would range from C+ to B. 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 Sycamore Canyon Park, with 0.8 miles. Directions go to the nearest trailhead or public parking.
Tres Hermanos Ranch
Managed by Tres Hermanos Conservation Authority
594 acres0.2 mi of trail
Dog rules not recorded
Directionsto the parking lotWebsite ↗
Summitridge Park
Park
19 acres0.2 mi of trail
Diamond Bar Loop
Dog rules not recorded
Directionsto the parking lot
All 12 parks & preserves
Sycamore Canyon Park48 acres · 0.8 mi of trail
DirectionsDiamond Canyon Park4 acres · 0.7 mi of trail
DirectionsTres Hermanos Ranch594 acres · 0.2 mi of trail · Tres Hermanos Conservation Authority
DirectionsSummitridge Park19 acres · 0.2 mi of trail
DirectionsRonald Reagan Park6 acres · 0.2 mi of trail
DirectionsSummitridge Longview drive Park1 acres · 0.2 mi of trail
Maple Hill Park6 acres · 0.1 mi of trail
DirectionsPantera Park15 acres
DirectionsCarlton J. Peterson Park8 acres
DirectionsPaul C. Grow Park4 acres
DirectionsHeritage Park3 acres
DirectionsStarshine Park2 acres
Who protects it
403 conserved acres
4% of Diamond Bar’s land. Who manages Diamond Bar’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
Town or city314 ac
County171 ac
Local Park · 269 acLocal Recreation Area · 171 acLocal Other or Unknown · 45 ac
The biggest protected parcels
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Diamond Bar Golf Course Local Recreation Area | County | 171 | Restricted |
| Diamond Bar City Parkland Local Park | Town or city | 82 | Open |
| Pantera Park Local Park | Town or city | 63 | Open |
| Sycamore Canyon Park Local Park | Town or city | 50 | Open |
| Unnamed site - Diamond Bar, City of Local Other or Unknown | Town or city | 45 | Closed |
| Summit Ridge Park Local Park | Town or city | 19 | Open |
| Carlton Peterson Park Local Park | Town or city | 16 | Open |
| Larkstone Park Local Park | Town or city | 7 | Open |
| Ronald Reagan Park Local Park | Town or city | 6 | Open |
| Maple Hill Park Local Park | Town or city | 5 | Open |
5 smaller protected places aren’t shown.
Things to do
40 places to go in Diamond Bar
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Playgrounds in Diamond Bar
38 playgrounds are on OpenStreetMap in all; the list shows named ones from the first 30.
Dog parks in Diamond Bar
2 dog parks without a name on the map. Tap “Show all on map” to see them.
Trails & water
2 named trails
Named trails
Unpaved · 3.3 mi
Diamond Bar Loop1.6 mi
Pantera Park Trail0.8 mi
Biking & sports
22 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
22 mi
painted or protected bike lanes
0.1 mi
shoulders & shared lanes
Courts & fields
106Tennis
36Basketball
22Baseball
11Volleyball
5Pickleball
2Football
2Soccer
1Skate park
Includes school and college facilities, which aren’t always open to the public.
When to get out
The best walking months in Diamond Bar: 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) | 68 | 68 | 71 | 75 | 77 | 83 | 89 | 91 | 88 | 81 | 74 | 67 |
| Rain (in) | 3.6 | 4.0 | 2.3 | 0.9 | 0.4 | 0.1 | 0.0 | 0.0 | 0.1 | 0.6 | 0.9 | 2.4 |
August is the driest month (under 0.1 in) and the warmest (highs of 91 °F). 4.0 inches fall in February, the wettest month. Summer highs reach 91 °F, too hot for the outline. The climate in Diamond Bar →
Next door
Diamond Bar and its neighbors
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 |
|---|---|---|---|---|---|
| Diamond Bar | 4% | 0.5 | 4 | 76% | B− |
| Industry | — not graded: under 1,000 residents or part of its town | ||||
| Pomona | 3% | 0.3 | 2 | 94% | C+ |
| Rowland Heights | 6% | 1.1 | 10 | 67% | B+ |
| Chino Hills | 39% | 2.9 | 140 | 98% | A+ |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Diamond Bar
Where can I hike in Diamond Bar?
The longest trail networks: Sycamore Canyon Park, 0.8 miles; Diamond Canyon Park, 0.7 miles; Tres Hermanos Ranch, 0.2 miles; Summitridge Park, 0.2 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Diamond Bar is conserved land?
4% 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 Diamond Bar’s trails?
Sycamore Canyon Park and Diamond Canyon Park don’t have dog rules recorded on the map; check the signs at the trailhead.
Where can I bike in Diamond Bar?
22 miles of bike routes are on the map: 22 of painted or protected lanes and 0.1 of shoulders and shared lanes.
Is there public land near Diamond Bar?
39,088 acres of parks and open public land lie inside Diamond Bar or within 10 miles of it (PAD-US), 193 of them inside the city line.
How much outdoors does Diamond Bar have?
Ahead of 51% of U.S. towns on the Outdoors grade, #527 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 Diamond Bar 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 →