Allerton Park consists of over 1,500 acres, including the Sangamon River, floodplains, lowland and upland forests, a meadow, prairies, and over 15 miles of hiking trails. Allerton’s Natural Areas comprise 95% of the Park and constitute one of the most valuable forests in Illinois.
Located in the Grand Prairie Natural Division (Schwegman, et al. 1973), Allerton contains outstanding examples of old-growth floodplain and upland forest. It supports populations of the state endangered eastern massasauga (Sistrurus catenatus), state threatened Kirtland’s watersnake (Clonophis kirtlandii), black-billed cuckoo (Coccyzus erythropthalmus) and Mudpuppy (Necturus maculosus).
As one of only three areas in central Illinois with over 500 acres of contiguous forest, the Park serves as an important breeding area for many neotropical migrant birds, whose populations have declined dramatically as forest fragmentation has created smaller and more isolated woodlots.
The high diversity of natural communities and native species, especially forest trees and wildflowers, and the Park’s location along an unmodified stretch of the Sangamon River also contribute to the high natural quality of the site. A portion of the site has been recognized as a National Natural Landmark by the National Park Service. We practice a variety of land management techniques to protect, maintain, and enhance this important feature of the Park. Learn more about our Natural Areas Management Plan.
Experience this unique aspect of Allerton Park by joining a guided hike or exploring the trails on your own! You can also find information about research taking place in the Natural Areas.
Birding
Allerton is a wonderful location for birding in Central Illinois! With over 15 miles of trails through the Natural Areas, there are endless opportunities for birding, and more than 210 species have been recorded at Allerton Park. Click here for a list of recent observations.
