Tyler Bush scored five of his season-high 14 points during a game-deciding 8-2 spurt in the fourth quarter after Riverton had clawed back to tie the score at 40.
It was just the second time in double figures for Bush, who made two of the Grizzlies’ seven 3-pointers, including one to put Copper Hills (11-7, 4-0) up 48-42 with 3:31 to play.
Riverton (14-5, 3-1) played mostly from the perimeter on the offensive end, and made eight 3-pointers. But the Silverwolves, who lost for just the second time in their past 12 games, attempted only five free throws, and didn’t make one in the second half.