1
The Hollows Conservation Area
Nature preserve
343 acres5.2 mi of trail
Dogs on leashMapped in OpenStreetMap
Outdoors · Algonquin
Algonquin, IL parks, trails & bike paths
About 12% of Algonquin is conserved land, roughly 3,513 acres. There are about 51 miles of mapped trails, and the biggest networks are in The Hollows Conservation Area (5.2 mi), Rotary Park (3.6 mi), and Lake In The Hills Fen Nature Preserve (3.4 mi).
Conserved land, trails, parks and bike routes in Algonquin, measured from OpenStreetMap and USGS data.
At a glance
Algonquin outdoors
Conserved land
12%
3,513 of 30,599 acres
Trails
51 mi
1.1 mi per sq mi · 24 on conserved land
Parks & preserves
65
40 conserved acres per 1,000 residents
Bike routes
64.7 mi
8.2 mi lanes · 56.5 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
Rotary Park
Managed by Village of Cary, IL
232 acres3.6 mi of trail
Brown TrailRed TrailYellow TrailPeninsula
Dogs on leashMapped in OpenStreetMap
3
Lake In The Hills Fen Nature Preserve
Nature preserve
265 acres3.4 mi of trail
INVISIBLE
Dogs allowedMapped in OpenStreetMap
4
Illinois Department of Natural Resources
Managed by Illinois Department of Natural Resources
144 acres3 mi of trail
South Trail
No dogsMapped in OpenStreetMap
DirectionsTo the parking lot
5
Fox Bluff
Managed by McHenry County Conservation District
166 acres2.6 mi of trail
Dog rules not recorded
6
Three Oaks Recreation Area
Managed by City of Crystal Lake
481 acres2 mi of trail
Dog rules not recorded
7
Fel-Pro RRR Conservation Area
Managed by McHenry County Conservation District
245 acres2 mi of trail
West Loop (0.38mi)West Pond Loop (0.22mi)
Dog rules not recorded
8
Hoffman Park
Managed by Cary Park District
271 acres1.1 mi of trail
Dog rules not recorded
All 65 parks & preserves
Showing 1–10 of 65 parks & preserves
The Hollows Conservation Area343 acres · 5.2 mi of trail
Rotary Park232 acres · 3.6 mi of trail · Village of Cary, IL
Lake In The Hills Fen Nature Preserve265 acres · 3.4 mi of trail
Illinois Department of Natural Resources144 acres · 3 mi of trail · Illinois Department of Natural Resources
Fox Bluff166 acres · 2.6 mi of trail · McHenry County Conservation District
Three Oaks Recreation Area481 acres · 2 mi of trail · City of Crystal Lake
Fel-Pro RRR Conservation Area245 acres · 2 mi of trail · McHenry County Conservation District
Hoffman Park271 acres · 1.1 mi of trail · Cary Park District
Sands Main Street Prairie94 acres · 1.1 mi of trail
Hill Climb Park16 acres · 0.4 mi of trail
Who protects the land
3,513 conserved acres
Who manages it, from PAD-US. Approximate, because parcels can overlap.
Conserved doesn't always mean open to visitors. 377 acres are conservation easements, which are usually private land. Public access isn't recorded for 1 of 150 parcels. The places listed above are parks and preserves people visit.
Biking & sports
Bike routes, courts & fields
- Painted or protected bike lanes8.2 mi
- Off-road bike paths56.5 mi
- Shoulders & shared lanes0.0 mi
Courts & fields
- Tennis72
- Baseball57
- Basketball30
- Pickleball14
- Soccer12
- Beach volleyball9
- Football6
Counts include school and college facilities, which aren't always open to the public.
Nearby
Algonquin and its neighbors
Towns whose outdoors data has been built so far.
| Town | Conserved | Trails | Parks & preserves |
|---|---|---|---|
| Algonquin | 11.5% | 51.4 mi | 65 |
| Nunda | 15.6% | 38.3 mi | 32 |
| Dundee | 21% | 55.1 mi | 51 |
| Cuba | 8.4% | 11.2 mi | 8 |
| Oakwood Hills | 7.1% | 6.6 mi | 3 |
| Port Barrington | 6.6% | 1.3 mi | 1 |
| Grafton | 7.9% | 28.8 mi | 23 |
Trail talk
Conditions & tips from neighbors
No recent posts about Algonquin'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 22.4-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.