1
Yonder Prairie
Managed by The Land Conservancy of McHenry County
72 acres1.2 mi of trail
Dogs on leashMapped in OpenStreetMap
DirectionsTo the parking lot
Outdoors · Seneca
Seneca, IL parks, trails & bike paths
About 3.8% of Seneca is conserved land, roughly 876 acres. There are about 5.7 miles of mapped trails, and the biggest networks are in Yonder Prairie (1.2 mi) and Westwood Conservation Area (0.5 mi).
Conserved land, trails, parks and bike routes in Seneca, measured from OpenStreetMap and USGS data.
At a glance
Seneca outdoors
Conserved land
3.8%
876 of 22,823 acres
Trails
5.7 mi
0.2 mi per sq mi · 2 on conserved land
Parks & preserves
4
304 conserved acres per 1,000 residents
Bike routes
1.1 mi
0.0 mi lanes · 1.1 mi off-road paths
Conserved land is a share of the whole town area. Bike lanes are often missing from the map in smaller towns, so that number is likely low.
Map
Conserved land, trails & bike routes
Tap a number or a place below to zoom in© OpenStreetMap contributors · USGS PAD-US
Places to walk
Parks & preserves with trails
Ranked by mapped trail miles. Directions go to the nearest marked trailhead or public parking.
2
Westwood Conservation Area
Park
63 acres0.5 mi of trail
Dog rules not recorded
No trailhead mapped yet
3
Pleasant Valley
Managed by McHenry Country Conservation District
453 acres
Dog rules not recorded
No trailhead mapped yet
Website
4
Emricson Park
Park
4 acres0.1 mi of trail
Dog rules not recorded
No trailhead mapped yet
Things to do
Beaches, playgrounds, falls & more
Pick a kind of place for the list, directions, or pins on the map above.
Playgrounds in Seneca
Unnamed playground
Water
Lakes & rivers
Tap a name for directions.
Who protects the land
876 conserved acres
Who manages it, from PAD-US. Approximate, because parcels can overlap.
Conserved doesn't always mean open to visitors. 313 acres are conservation easements, which are usually private land. Public access isn't recorded for 2 of 24 parcels. The places listed above are parks and preserves people visit.
Biking & sports
Bike routes, courts & fields
- Painted or protected bike lanes0.0 mi
- Off-road bike paths1.1 mi
- Shoulders & shared lanes0.0 mi
Courts & fields
- Tennis6
Counts include school and college facilities, which aren't always open to the public.
Public lands
The biggest protected places in Seneca
From USGS PAD-US: who manages each one and whether visitors are welcome.
Conservation Easement 530 acUnknown 245 acLocal Conservation Area 178 acLocal Park 64 acState Recreation Area 59 ac
Showing 1–10 of 13 places
| Place | Managed by | Acres | Public access |
|---|---|---|---|
| Pleasant Valley Northwest AdditionLocal Conservation Area | Regional agency | 92 | Open |
| Pleasant Valley 12Local Conservation Area | Regional agency | 86 | Access unknown |
| Kishwaukee Mill RaceUnknown | Regional agency | 86 | Open |
| Westwood Nature AreaLocal Park | Town or city | 64 | Open |
| The Land of OzUnknown | Land trusts & nonprofits | 61 | Open |
| Pleasant Valley 9State Recreation Area | Regional agency | 57 | Open |
| Yonder PrairieUnknown | Land trusts & nonprofits | 41 | Open |
| E. TauckUnknown | Land trusts & nonprofits | 28 | Open |
| Yonder Prairie - O'Leary AdditionUnknown | Land trusts & nonprofits | 23 | Open |
| Pleasant Valley 11State Conservation Area | Regional agency | 18 | Access unknown |
History
Historic places to visit
Pioneer CemeteryCemetery
Nearby
Seneca and its neighbors
Towns whose outdoors data has been built so far.
Trail talk
Conditions & tips from neighbors
No recent posts about Seneca's trails yet. Muddy, icy, a bridge out, where to park: a quick post helps the next person.
Sources: trails, parks, preserves, courts and bike lanes © OpenStreetMap contributors (ODbL), map data as of 2026-09-28. Conserved land: USGS Gap Analysis Project, Protected Areas Database of the United States (PAD-US). Measured against the Census town boundary.
How we measure
"Trails" are OpenStreetMap paths, bridleways, public tracks and unpaved footways, plus footways inside a park or preserve or on a named trail route. Sidewalks are left out. Areas are counted on a 20-meter grid, so overlapping parcels count once. "Conserved" includes conservation easements, which protect land from development but are usually private property. Trailheads are the nearest marked trailhead, public parking lot or information board within about 150 meters of a preserve. Dog rules come from OpenStreetMap when someone has tagged them; otherwise we show what's typical for the land manager, or say the rules aren't recorded.