Riverside beat host Kettle Falls 25-17, 19-25, 25-14, 25-16 on Tuesday in the season-opener for both teams.
Courtney Davis paced the Rams with 15 digs, three aces and three blocks.
In other league play, visiting Newport swept Medical Lake 25-13, 25-17, 25-12 in the season opener for both teams.
Intermountain: Jailee Foster had four kills and three aces as Bonners Ferry opened league play by outlasting Kellogg in a five-set victory at Bonners Ferry. The Badgers won 25-19, 17-25, 25-20, 10-25, 15-9.
Amdee Wendt had six kills, 14 digs and five blocks for the Wildcats.
Inland Empire 5A: Lewiston beat Coeur d’Alene 25-23, 21-25, 25-15, 25-22 at CdA.