Secret City Half Marathon

Secret City Half Marathon is run in Oak Ridge, Tennessee, on November 21, 2026 with two formats: a 5K and the half marathon (13.1 miles) that gives the event its name. The course passes through areas close to lakes and public parks.

Pairing a short and a long distance lets you enter at your own level: the 5K is a good option for a first race or a fast effort, while the half marathon suits runners looking for a late-fall goal after a 10- to 12-week build with a weekly long run. Water and green spaces, typical of this Tennessee city, shape the scenery along the route, so you get a pleasant setting whichever distance you pick, and the late-November date makes it a natural end-of-season target before winter training begins.