Johnston, making its first-ever state tournament appearance, will face Iowa City West in the 2A championship game at 1 p.m.
Brown's goal was the difference maker in an otherwise evenly played match. Dowling outshot Johnston, 9-8, with Johnston goalkeeper Mallory Beck making nine saves.
Johnston improves to 15-2 while Dowling Catholic ends its season at 15-2. Both of the Maroons losses were to Johnston.
Dowling Catholic (15-2) 0 0 -- 0
Johnston (15-2) 1 0 -- 1
Goals:
2:38 J Kelsey Brown