The 2004 Pioneer PureVision Las Vegas Bowl was a post–season American college football bowl game, held on December 23, 2004, at Sam Boyd Stadium on the campus of the University of Nevada, Las Vegas, as a part of 2004–05 NCAA Bowl season.

The win ended the Cowboys' six-game bowl losing streak.

The Bruins had defeated the New Mexico Lobos 27–13 in the 2002 Las Vegas Bowl.

Wyoming upset UCLA, 24–21, on a 12–yard touchdown pass from Corey Bramlet to John Wadkowski with 57 seconds left in the game.

Maurice Jones-Drew rushed for 126 yards on 26 carries for the Bruins.