SEATTLE -- Fourth-ranked Stanford had more than Chiney Ogwumike to reach the Pac-12 tournament final.
Ogwumike had 25 points and 19 rebounds as the Cardinal advanced to its 12th straight tournament championship game with a convincing 61-47 victory over No. 18 Colorado on Saturday night at KeyArena.
But Stanford (30-2) extended its winning streak to 16 games with the help of a collective defensive effort that could be needed again Sunday night against UCLA, which upset Cal in the other semifinal.
It also might need another big game from Amber Orrange, who had 13 points, four steals and two blocks. Mikaela Ruef also came up big, adding 11 points, seven rebounds and four assists on a night when Ogwumike made only 9-of-24 shots.
"Chiney was a human," Stanford coach Tara VanDerveer said. "She missed some shots she has made all season."
Colorado had a lot to do with it by swarming the Pac-12 Player of the Year.
Stanford made only one 3-point shot but tried only three beyond the arc against an aggressive Buffaloes defense.
"Today we struggled at moments, but we just stayed together," Ogwumike said. "This game has taught us a lot: To stay with things."
Stanford trailed 28-27 at halftime -- only the fourth time it hadn't led at intermission this season.
But the Cardinal responded in the second half to slowly pull away from the Buffaloes, whose 10-game winning streak was snapped.
All-Pac-12 guard Chucky Jeffery led Colorado (25-6) with 19 points, but she made 9 of 24 because of Orrange's tenacious defense.
"We're finally figuring out how to put some pieces together on our team," Ruef said.
VanDerveer took no credit for the improvement in the second half when Stanford outscored Colorado 34-19.
"The best ideas at halftime were not mine," she said while crediting her assistants and players for a result that led to defeating Colorado for the third time this season.
Orrange helped Stanford gain some momentum after halftime. She made a steal and drove the length of the court for a layup and foul shot for a 36-33 lead with 15:51 left.
When Jeffrey made a 3-pointer to tie the it, Sara James matched her to launch a 9-0 tear for Stanford's biggest lead 45-36.
Now the Cardinal will go for its seventh straight league title, leading a question about the school's dominance. VanDerveer, though, protested.
"If it is a cakewalk I missed the cake," she said.
But Stanford hasn't missed the party.