ST. LOUIS —Scooter Vaughan’s end-to-end rush gave Michigan the lead on the game’s first shot and the Wolverines’ defense bottled up Colorado College throughout, earning a spot in the Frozen Four with a 2-1 victory in the NCAA West Regional final Saturday night.

Lee Moffie had a goal and an assist in the first period for Michigan (28-10-4), which has won 11 of 12 and will face either Denver or North Dakota in the national semifinals April 7 in St. Paul, Minn. It’s the 24th Frozen Four appearance and first since 2008 for a school that leads the nation with nine national titles and has made 21 consecutive NCAA tournament appearances under coach Red Berenson.

Michigan had to erase an early two-goal deficit to beat Nebraska-Omaha in overtime in the regional semifinals, but grabbed a two-goal lead in the first period and kept the pressure on despite leaning heavily on the penalty kill for the second straight night. The Wolverines outshot Colorado College 43-21.

Rylan Schwartz scored a power-play goal with 3:35 to go for Colorado College (23-19-3), which failed to follow up an eight-goal outburst in its semifinal upset of top regional seed Boston College. Colorado College was 1 for 7 on the power play, and opponents were 1 for 13 in the tournament.

Michigan goalie Shawn Hunwick had a run of 43 consecutive saves in the regional before Schwartz tipped in a rebound late.

Vaughan drove the net and beat Joe Howe at 2:23 of the first even though Colorado College had four men back. Moffie scored his eighth goal, most among Wolverines defensemen, on a power play at 17:33 of the first.

Not long before the game, officials considered and ultimately decided against awarding Michigan’s overtime goal in the semifinals to Greg Pateryn, whose shot from the right point started the play. The puck deflected off the end boards and Kevin Lynch was credited for tipping it off a defenseman and into the net, although the replay wasn’t conclusive.

Officials reviewed the deciding goal against Nebraska-Omaha for more than 10 minutes after initially ruling no goal.