Stuart Walton's power play goal at 14:01 of the first period was the only goal the Rebels would need as Castlegar shut out the visiting Kimberley Dynamiters.
Connor Beauchamp picked up the shutout for Castlegar as turned away all 19 Nitro shots.
Tomorrow (Saturday), the Rebs are at home for the second night in a row against Osoyoos, the team that knocked Castlegar out of the KIJHL play-offs last year.