Shawnee National Forest
Shawnee National Forest is a easy 100+ miles off-road trail near Harrisburg, IL. It requires a stock high-clearance 4WD with all-terrain tires and is best run Year-round. Stock Jeep Wranglers, 4Runners, and Tacomas can complete it without modifications.
Trail Conditions
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Southern Illinois's Shawnee National Forest is a geological wonderland of sandstone canyons, natural bridges, and dramatic rock formations that defy every expectation of flat Illinois. Forest roads pass Garden of the Gods, Giant City, and bluffs overlooking the Ohio River.
Fun Facts
Garden of the Gods is 320 million years old.
Southern Illinois is where northern and southern ecosystems meet, creating exceptional biodiversity.
Giant City State Park was named for the massive sandstone 'streets' between rock blocks.
🛞 Tires
Where to Camp
GPS Coordinates
Import into Gaia GPS, OnX Offroad, or Garmin
Map of Harrisburg, IL
5-Day Forecast
WHAT YOU'LL NEED
Stock rigs can usually run this trail, but the right tire size and fitment make it more enjoyable.
Tire Size Calculator
Convert tire sizes and compare diameter differences before you swap.
Verify your stock tires meet minimum clearance for this trail.
Gear Ratio Calculator
Find the right gear ratio after lifting or upsizing tires.
Re-gear after a tire upgrade to restore trail torque and MPG.
Wheel Fitment Calculator
Calculate backspacing and offset so wider wheels clear your suspension.
Ensure any wheel upgrade clears your factory suspension.