The Senators were to face the Billings Royals on Sunday afternoon.
With the win, Helena also clinched a berth in the Northwest Regional next week in Gillette, Wyoming.
“It means a lot,” Senators head coach Jon Burnett said. “Our goal is to win that state championship. We’re happy we’re there. We’re not done yet. We’re hoping we can put a good one together here. Our ultimate goal is to win that state title.”