Marathon is located at 25100 Little Mack Ave, St Clair Shores, MI. This business specializes in Grocery Stores and Auto Fuel & Oil. Marathon is open Mon, 5am-11pm; Tue, 5am-11pm; Wed, 5am-11pm; Thu, 5am-11pm; Fri, 5am-11pm; Sat, 5am-11pm; Sun, 5am-11pm and accepts American Express, Discover, Mastercard and Visa.