Illinois River Bluffs Historic Military Road

The Illinois River Bluffs Historic Military Road traces the original 1830s military supply route that connected Fort Armstrong to Chicago, following limestone terraces 200 feet above the Illinois River. Modern adventurers can pick up sections of the old road near Starved Rock, where deep wagon ruts are still visible in the sandstone, and follow it northwest past Eagle Cliff and Lover’s Leap overlooks. The route becomes technical at Buffalo Rock, where early engineers blasted through solid limestone to create the notorious Devil’s Nose passage that claimed wagons and pack trains alike.

This difficult route requires experienced drivers and modified 4WD vehicles with rock sliders—the limestone ledges are unforgiving. Spring and fall offer the best conditions when river fog isn’t obscuring the trail markers. No permits needed, but check with Starved Rock State Park for seasonal closures during eagle nesting season. Bring plenty of water and recovery gear; cell service is spotty to nonexistent along the bluff sections. What you’re rewarded with are some of the most dramatic river valley views in Illinois and genuine pieces of frontier history etched in stone.