2012 Detroit Marathon: Route information, course map and more

The 34th annual Detroit Free Press Marathon is underway Sunday in Detroit.

The races started at 6:58 a.m. with the disabilities division. The full- and half-marathons and five-person relay started at 7 a.m., the U.S.-only half marathon started at 7:25 a.m. and the 5K starts at 11 a.m.

The race is an international one as runners start in Detroit, pass through Canada and finish back in Detroit. The course takes runners along the Detroit River, across the Ambassador Bridge into Canada and through the Detroit-Windsor Tunnel back into the city. See the entire course map here. The course passing through the Windsor Tunnel makes the Detroit Free Press Marathon the only race in the world that goes through an underwater tunnel.

Americans Nicholas Stanko (2009) and Jordan Desilets (2010), and Canadian Derek Nakluski (2011) are the winners of the last three races. Prior to 2009, an American hadn't won since 1999. Eight Kenyans and one European won during that span.

Just three American women have won since 2000: Lisa Veneziano in 2000, Lupe Hegan in 2001 and Sarah Plaxton in 2009.

More information is available on the Detroit Free Press Marathon website.