Springfield defeated Mountain View and Willamette knocked off Corvallis in the 5A semifinals to set up a rematch for the state championship on Saturday.
West Albany led Corvallis 25-22 on Lauren Conser's free throw with 6:12 remaining in the game, but Leslie Robinson scored on a tip-in and a layup and the Spartans led the rest of the way.
Breann Partney led Le Grande with had 18 points and 13 rebounds, and she was 14-of-14 from the free throw line as the Tigers knocked off previously unbeaten Sutherlin 66-56 in the 4A girls semifinals.
Orion Wright had 14 points and 10 rebounds and top-ranked Cascade beat Philomath 45-37 to advance to the OSAA Class 4A championship game.
Springfield's quest to win a third straight state championship began with a 71-33 victory over Lebanon at Matthew Knight Arena on Thursday afternoon.
Miranda Mendenhall made a pair of free throws with one second left as Sutherlin defeated Junction City 44-42 in the 4A girls quarterfinals on Wednesday at Gill Coliseum.
Victor Sanders, Kadeem Strickland and Devaunte Paschal each had 12 points for Portland's Jefferson in a 55-52 victory over West Albany in quarterfinal at the OSAA Class 5A boys tournament on Wednesday.
Using last season's early exit from the playoffs as motivation, the Churchill Lancers beat Sandy 82-61 at Matt Knight Arena on Wednesday afternoon.
Ben DeSaulnier had 25 points and Derek Nash added 22 to lead Philomath to a 54-47 victory over North Bend in the quarterfinals of the OSAA Class 4A boys tournament on Tuesday.
The top-ranked Churchill Lancers head to the 5A Boys State Tournament with a pair of brothers in the backcourt and another down on the low blocks.
Just like football, the Oakland Oakers are 2A State basketball champions with a 60-54 win over previously unbeaten Irrigon.
Junction City and Sutherlin won their playoff games on Saturday night to advance to the 4A state tournament at Gill Coliseum in Corvallis.
Seven teams which made the 5A girls state tournament in 2012 are back in the tourney in 2013, including defending champion Springfield.
Jeb Harper went 5-for-5 from the field and scored 16 points to lead Oakland past Pilot Rock in the 2A state semifinals.
Jessep Fay scored 22 points and Mikah Reed had 16 to lead Elmira past South Umpqua 71-45 as the Falcons advance to the 4A state tournament.