In addition to Kolnes IL, 43 other teams played in Girls 15 - born 2003 - 11 aside. They were divided into 11 different groups, whereof Kolnes IL could be found in Group 11 together with Træff, KFUM-Kam. Oslo and Lom IL.

Kolnes IL continued to Playoff B after reaching 3:rd place in Group 11. In the playoff they made it to 1/8 Final, but lost it against Nore Neset/Os 2 with 0-2. In the Final, Vind/Vardal won over Charlottenlund SK and became the winner of Playoff B in Girls 15 - born 2003 - 11 aside.