UNLV went on a 9-0 run, capped by McCaw's steal and fast-break dunk, to take a 59-53 lead.
Boise State's zone forced a turnover and Nick Duncan hit a 3-pointer at the top of the key to pull to 77-72. McCaw answered with a 3-pointer from the wing and UNLV cruised.
Thompson led Boise State (15-6, 6-2) with 19 points. Webb had 14 points and 11 rebounds and Duncan added 11 points.