The Maine Mammoths were a professional indoor football team that was a member of the National Arena League (NAL) for the 2018 season.

Based in Portland, Maine, the Mammoths played their home games at the Cross Insurance Arena.

[1] The Mammoths are the first professional indoor or arena football team to be located in Maine.

After various speculation beforehand, the Mammoths were officially announced as a National Arena League (NAL) expansion team on December 5, 2017.

[2] The team was created by National Sports Ventures, a company led by NAL executive Rob Storm and Atlanta businessman Richard Maslia[3] and also included Jeff Bouchy, owner of the NAL's Jacksonville Sharks and the league's expansion chairman.