Are you looking for your first 100 mile run? This could very well be the course you're looking for! Flat, fast course on the Tunnel Hill Illinois State trail. From wildlife inhabited wetlands to gorgeous rock formations, this trail has it all. Smooth crushed limestone covered dirt bed is wide and contains no trip hazards. Best of all is the iconic tunnel... over 600' of thrills you'll always remember. Includes a 50-mile option... all the fun of the 100 miler, except you run the course once instead of twice.