The home team scored first on a power play goal by Hannah Zimmer, assisted by Aubrey Griffin and Myckenzie Cremers at 3:45 of the first period. An unassisted goal by Ellie Andersen at 8:27 tied the game at 1-1.
The second period was scoreless but River Lakes scored three third period goals to win the game. Zimmer scored unassisted at 3:38, Sophia Hess scored from Kianna Roeske and Brooke Lemke at 4:35 and Roeske scored at 16:40.
Ana Jyrkas stopped 25 of 29 River Lakes shots on goal. The Otters had 28 shots in the game.
Fergus Falls ends the season with a 10-9-1 record.