Photo: IvoShandor · CC BY-SA 3.0Few parks or trails are on the map in Seneca
5% of residents live within a half mile of a park. 56 acres are parks and preserves, 23 per 1,000 residents. 0.6 miles of mapped trail cross Seneca, 0.1 per square mile of land.
Ahead of 28% of U.S. towns. What drives it
How much outdoors does Seneca have?
On conserved land, trails, park land and how close residents live to a park, Seneca is ahead of 28% of U.S. towns. Park acres per resident hold the grade up; the share of residents near a park pulls it down.
Water is 6% of Seneca’s area (0 of 6 square miles), so every share here is of land; over land and water together, the conserved share would read 2%.
PAD-US, OpenStreetMap (© OpenStreetMap contributors), Census 2025 Gazetteer and 2020 blocks; details in Sources below. How TownRatings grades the outdoors →
Conserved land, trails & bike routes
Tap a number to zoom to a park. Tap a layer to hide it.
70 conserved acres
2% of Seneca’s land. Water is left out: Seneca has 6.0 square miles of land and 0.4 of water, so the share counts land only. Who manages Seneca’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Illinois and Michigan Canal State Trail Unknown | State natural resources | 69 | Open |
| Seneca Hill Prairie State Conservation Area | Other state land | 1 | Open |
2 places to go in Seneca
Beaches, playgrounds, peaks, falls and more. Pick a kind.
1 playground without a name on the map. Tap “Show all on map” to see it.
1 boat launch without a name on the map.
2.8 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
Includes school and college facilities, which aren’t always open to the public.
1 place on the National Register
The country’s official list of places worth saving (National Park Service).
The best walking months in Seneca: April and September
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) | 9.5 | 10.6 | 11.8 | 13.3 | 14.5 | 15.1 | 14.9 | 13.8 | 12.4 | 11.0 | 9.8 | 9.2 |
| High (°F) | 32 | 36 | 49 | 62 | 73 | 82 | 85 | 83 | 78 | 65 | 49 | 37 |
| Rain (in) | 2.0 | 1.8 | 2.3 | 3.6 | 4.6 | 4.4 | 4.0 | 3.8 | 3.3 | 3.1 | 2.5 | 2.0 |
February is the driest month (1.8 in) and July the warmest (highs of 85 °F). 4.6 inches fall in May, the wettest month. The climate in Seneca →
Seneca and its neighbors
Seneca 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 |
|---|---|---|---|---|---|
| Seneca | 2% | 0.1 | 23 | 5% | C |
| Brookfield Township | 7% | 0.4 | 2,026 | 4% | B |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Seneca
How much of Seneca is conserved land?
2% of its land, against a typical 4% for an Illinois town and 4% nationally (PAD-US). Conserved doesn’t always mean open to visitors: easements are usually private land.
Where can I bike in Seneca?
2.8 miles of bike routes are on the map: 2.8 of off-road paths.
Is there public land near Seneca?
4,114 acres of parks and open public land lie inside Seneca or within 10 miles of it (PAD-US), 69 of them inside the town line.
How much outdoors does Seneca have?
Ahead of 28% 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 Seneca neighbors.
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 →