Event Description This is a beautiful, flat course partially run on the Eastern Trail. The proceeds benefit Scarborough Marsh Audubon Center and the Eastern Trail. There are fabulous prizes, trophies, and gifts for all. Event Location & Accomodations Trending Events The Mammoth at High Hope Ranch 100K - 50K - 25K - 10K - 5K and Mighty Mammoth 1K Fun Run Divas Chicago Half Marathon and 5k Run For The Heart 5k