The Warriors lost to Watervliet in straight sets, 25-21, 25-16, 25-23.
Ashley Folkema led the way with nine kills, followed by Abby Leffring with eight and Hannah Heiss with six. Nora Anderson had four kills and Bro Warners had 26 assists.
Watervliet (29-3-1) moves onto the regional final against Pewamo-Westphalia (49-2-2) on Thursday night. Pewamo-Westphalia defeated Grand Rapids Covenant Christian in the other semifinal match.