Oak Point State Park Glacial Esker Trail

The Oak Point area showcases the raw power of glacial action, where massive ice sheets deposited sand and gravel ridges called eskers across what was once the bottom of prehistoric Lake Warren. The main trail follows these narrow ridges for 6 miles through oak savannas and wet prairies, with the highlight being the Devil’s Backbone—a knife-edge esker barely wide enough for a single vehicle with 20-foot drops on either side. Spring flooding often isolates sections, creating temporary islands accessible only to those willing to wade through knee-deep marsh water.

Easy to moderate terrain suitable for any high-clearance vehicle, though the sand can be surprisingly soft in wet conditions. Best visited from late June through September when water levels drop and the trail firms up. No fees or permits, but check with Ohio Department of Natural Resources about seasonal closures for nesting birds. Bring bug spray—the mosquitoes here are legendary. What you get is a geology lesson written in sand and a taste of what Ohio looked like when the ice finally retreated 12,000 years ago.