In addition to Kolbotn IL, 20 other teams played in 12-14 august Jenter 13 (FØDT 2009) 9er Elite. They were divided into 4 different groups, whereof Kolbotn IL J13 could be found in Group C together with Lyn Fotball, Ørn Horten, FK Horten and Stange.

Kolbotn IL J13 continued to Slutspill A after reaching 2:nd place in Group C. In the playoff they made it to Semi final, but lost it against Melhus IL with 0-3. In the Final, Lyn Fotball won over Melhus IL and became the winner of Slutspill A in 12-14 august Jenter 13 (FØDT 2009) 9er Elite.

Kolbotn IL also participated in 20-22 august Jenter 13 (FØDT 2008) 9er Elite during Jente Talent Cup 2021-høst. They reached the 1/4 Final in J13 9er Elite Slutspill A, but lost it against Lommedalens IL Wildcats with 2-3.