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  1. Illinois DNR
  2. Illinois Nature Preserves Commission

Harlem Hills

Nature Preserve Area: 
1
County: 
Winnebago
Location and Access: 
From the intersection of Highway 51 and Windsor Road on the north side of Loves Park turn east on Windsor Road and go 1.3 miles to where Windsor Road makes a "T" at Forest Hills Road. Turn north on Forest Hills Road and go a little more than 0.1 mile to Flora Drive. Turn east on Flora Drive and go 0.1 mile, the preserve is on the south side of the road.

Description: 
This gravel prairie contains a large number of plant species, including several that are threatened or endangered in Illinois. One of the most remarkable features of this preserve is the large number of prairie wildflowers, especially pale purple coneflower. Pasque flowers can be observed here during the spring. The rare plants that are found here are the pink milkwort, downy yellow painted cup, Hill's thistle and prairie buttercup. Harlem Hills is Illinois' largest and finest remaining example of a gravel hill prairie.

Ownership: 
Illinois Department of Natural Resources and Natural Land Institute
Dedicated: 
August 1973
Size: 
94.61 acres with buffer
Topographic Quad: 
Rockford North
Topo Map: 
Directions: 
For further information: 
Illinois Department of Natural Resources, Natural Heritage Biologist, Lost Mound Unit, 3159 Crim Drive, Savanna, IL 61074, or Site Superintendent, Rock Cut State Park, 7318 Harlem Rd. Caledonia, IL 61011 (815/885-3612)

3/2010 - R. Heidorn