In addition to Lillestrøm, 27 other teams played in 13-15 august Jenter 15 (FØDT 2006) 11er Elite. They were divided into 7 different groups, whereof Lillestrøm could be found in Group B together with Ullern/Fossum, Bjarg, IL and Gullvikmoen IL.

Lillestrøm made it to Slutspill A after reaching 1:st place in Group B. Once in the playoff they won every match inluding the Final against Borre IF, which they won with 1-0. Thereby Lillestrøm won the entire Slutspill A in 13-15 august Jenter 15 (FØDT 2006) 11er Elite during Jente Talent Cup 2021-høst.