Shawnee National Forest
Shawnee National Forest is an easy 100+ miles off-road trail near Harrisburg, IL, best run Year-round. No gear is marked required; All-terrain tires is recommended. A stock high-clearance 4x4 can run it; check the gear list before you go.
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
Closest campgrounds to Shawnee National Forest:
- Camp Cadiz Campground · 17 mi (straight-line)
Straight-line distance. Check the map for drive time.
GPS Coordinates
Import into Gaia GPS, OnX Offroad, or Garmin
Map of Harrisburg, IL
5-Day Forecast
Nearby Trails
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.