12-Week Detroit Free Press Marathon Training Plan

The 2027 Detroit Free Press Marathon is scheduled for October 17, 2027, so the 12-week window opens around July 25, 2027. Treat that as the outside edge of the window, then line week one up with the plan's normal weekly rhythm.

Use this window when your recent training is steady and the opening week will not be a mileage jump. If you are returning after a long break, twelve weeks is too little room to rebuild and peak at the same time. The course does not change the opening load you can handle, so choose from your current mileage and recent longest run before adding race-specific terrain.

Course-specific work starts early in a 12-week build. Put the race's terrain and expected conditions into long runs once the opening weeks feel controlled, without adding extra hard days. Two Detroit specific sessions matter. First, put a climb in the first fifteen minutes of some long runs, so the Ambassador Bridge at mile two doesn't cost you an effort spike that you pay for at mile 22. Second, practice running a full mile purely by feel, because your watch goes dark in the tunnel.

Do not double weeks or cram missed mileage into the remaining calendar. Use your current mileage, recent longest run, experience, goal, and available days to choose a plan that can enter at an appropriate point while preserving the taper.

Yes. The marathon crosses into Canada, so every runner needs a valid passport, a WHTI compliant document, or an enhanced driver's license from Michigan, Minnesota, New York, Vermont or Washington. The race also warns that past convictions including OWI or DUI can make a runner inadmissible to Canada without a special permit.

Yes. The course gains 388 feet and loses 397 across 26.2 miles, a net drop of nine feet, with everything between 538 and 740 feet of elevation. The only meaningful climb is the Ambassador Bridge about two miles in. After that the race becomes an exercise in holding one steady effort.