2020/2021 Indoor Registration is now OPEN. Author northsidePublished on September 3, 2020September 4, 2020 Indoor soccer registration for ages five (U6) to nineteen years old (U19), birth years 2015 to 2002. Northside Soccer is a Calgary NorthWest City League Soccer program open to players from all communities. Competitive (CMSA): Click here for more information. Recreational League: Click here for more information.