Midewin National Tallgrass Prairie is the first national tallgrass prairie in the United States, established in 1996 on the former Joliet Arsenal in Will County, Illinois. Spanning approximately 18,225 acres with over 34 miles of trails (roughly half open to the public), it is managed by the USDA Forest Service. Gentle swells of big bluestem and wildflowers, abundant grassland birds, and a deep, quiet sky define this restored landscape—a rare window into Illinois’ original prairie heritage.
Best season — Spring through fall; late-summer wildflowers and fall grass colors are highlights, while spring and fall migrations bring peak bird activity. Summer can be hot and humid.
At a glance
The facts worth checking before you roll out
Conservative, source-minded facts for planning your visit — always worth confirming against current conditions before you travel.
Managing agency
U.S. Forest Service (USDA)
State
Illinois (Will County, near Wilmington)
Distinction
First national tallgrass prairie in the United States, established 1996 on the former Joliet Arsenal
Size
Approximately 18,225 acres with over 34 miles of trails (about half open to the public)
On the ground
Midewin National Tallgrass Prairie is a unique landscape, established on the former Joliet Arsenal in Will County, Illinois. As the first national tallgrass prairie in the United States, it represents an important restoration effort. The USDA Forest Service manages this approximately 18,225-acre area, preserving a piece of Illinois’ original prairie heritage for future generations.
RV travelers can experience Midewin through its network of over 34 miles of trails, with roughly half currently open to the public. Hiking and biking provide opportunities to explore the rolling grasslands and observe abundant grassland birds. Interpretive elements along the routes offer a deeper understanding of this restored ecosystem.
The best time for RV travel at Midewin is spring through fall. Late summer showcases wildflowers while autumn brings colorful grasses. Bird activity peaks during spring and fall migrations. Visitors should be aware that summers can bring hot and humid conditions to this Illinois prairie landscape.
Consider establishing a basecamp in the general vicinity of Wilmington, Illinois, to explore Midewin National Tallgrass Prairie. This allows flexible access for day trips into the park. From there, RV travelers can readily experience the expansive views and quiet beauty of this restored tallgrass prairie.
Official sources
- U.S. Forest Service — Midewin National Tallgrass Prairie USDA Forest Service
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