In addition to the two Kärra teams, 57 other teams from 9 different countries played in Girls 12. They were divided into 9 different groups, whereof Kärra HF 1 could be found in Group 3 together with Ljunghusens HK, IF Stjernen, Fjellhammer IL 1, Eskilstuna Guif 2 and HK Aranäs 2. Kärra HF 1 continued to B-Play-off after reaching 5:th place in Group 3. In the playoff they made it to 1/8 Final, but lost it against IK Sävehof 5 with 3-8. In the Final, H43 Lund 2 won over Fjellhammer IL 3 and became the winner of B-Play-off in Girls 12. Kärra HF also participated in Girls 11 during Partille Cup 2018. They reached the 1/4 Final in G11 A-Play-off, but lost it against Skuru IK 1 with 8-20.