Dances with Dirt Devil's Lake Wisconsin is a 100K five person relay, 50-mile and 50-kilometer ultramarathon, marathon, and half marathon held in July near Madison, Wisconsin.
The Blue Mound Trail Run is an 18K and 11K event held out at Blue Mound State Park west of Madison in June of every year. This race only allows 300 participants, and it does sell out!
Blue Mound State Park has some of the most technical trails in the Madison area, making this a great workout.