| Middlefork Savanna | |
| Alt Name: | Middlefork Savanna Forest Preserve |
| Iucn Category: | V |
| Map: | Illinois#USA |
| Relief: | 1 |
| Location: | Lake County, Illinois |
| Nearest City: | Lake Forest, Illinois |
| Area Acre: | 687 |
| Established: | 2002 |
| Governing Body: | Lake Forest Open Lands Association |
| Website: | https://www.lcfpd.org/middlefork-savanna/ |
Middlefork Savanna is a of nature preserve in Lake Forest, Illinois.[1] Several biomes including oak savannas, dry-mesic prairies, wet-mesic prairies, marshes, deciduous woodlands, and sedge meadows as well as a portion of the North Branch of the Chicago River are found in the preserve. The Middlefork Savanna also contains of the “highest quality tallgrass savanna of its kind” in the United States. Such ecosystems are globally endangered.[2] The preserve includes 5.5 miles of gravel trails for hiking and cross-country skiing as well as 4.2 miles of trails for biking.[2] It is managed by Lake County Forest Preserves.
Middlefork Savanna opened to the public in 2002. The preserve’s land was purchased by the Lake County Forest Preserves in phases, the first of which was in 1989. The last addition to the preserve was made in 2000.[2]
It is named for the middle fork of the north branch of the Chicago River that passes through the area. The historic Elawa Farm, owned by the City of Lake Forest, is adjacent The preserve is inhabited by endangered species and includes 25 acres highest quality black soil savannah. Many bird species have been documented in the preserve.[3]
The area was once part of a glacial lake. Lake Forest College students have studied at the preserve.[4]