2021/2022 Indoor Registration is OPEN. Author northsidePublished on September 24, 2021September 24, 2021 Indoor soccer registration for ages four (U4) to nineteen years old (U19), birth years 2018 to 2003. Northside Soccer is a Calgary NorthWest City League Soccer program open to players from all communities. Competitive Soccer (CMSA): Click here for more information. Grassroots / Training: Click here for more information.