Big Discount to The Biggest Loser Run/Walk Eua Claire Half Marathon for Fifty States Half Marathon Club members! Eau Claire is located in Northwestern Wisconsin, about an hour and a half east of Minneapolis - St. Paul International Airport. Eau Claire is a college town, as well as an area of lakes, trails, recreation, and museums. This Eau Claire half marathon event takes place October 18th, 2015, which will make for a beautiful visit, experiencing the colorful Wisconsin fa