Bountiful used a big 4th quarter to beat Mountain View, 61-46, behind 19 points and 10 rebounds by Zac Seljaas.
The Braves will face off against Olympus, a 65-50 winner over Highland. Alec Monson led the Titans with 23 points and 9 rebounds.
In the other semifinal, it will be Orem against Springville.
The Red Devils upset Roy, which was playing without its best player, Brekkott Chapman, who was suspended for violating team rules. Springville was paced by Rhett Clark's 13 points held on for the 48-45 victory.
Orem won a defensive battle against Kearns, 48-37. BYU-bound senior Dalton Nixon led the way with 18 points and 12 rebounds for the Tigers.