At Osborn Aquatic Center, Corvallis

Boys semifinals, No. 1 Mountain View (20-3) vs. No. 5 Summit (14-11), 12:10 p.m.: Two of the top programs in the state square off — again — in the first of two semifinals, and they are all too familiar with each other. The Cougars, who won 18-4 against No. 8 Churchill in last Thursday’s quarterfinals, have won the past two state championships and three of the past four. Meanwhile, Summit, a 6-4 quarterfinal winner over No. 4 Parkrose last week, has placed third or better at state each season since 2012, including the 2014 state title. Mountain View won both East League matchups (14-7 and 13-8) against the crosstown rival Storm this season with Taiton Fox, the 2016 5A/4A state tournament MVP, totaling 11 goals, six assists, six steals and four blocks in the two games. The Storm are paced by Kole Miller, a second-team all-tournament selection last season who had four goals against Parkrose last week. Tarren Black and Tanner Steele, who each scored three times last week, will be part of a Mountain View attack that looks to challenge Storm goalie Ty Zuber, who racked up 17 saves in Summit’s quarterfinal win.

Boys semifinals, No. 3 Bend (15-8) vs. No. 2 Hood River Valley (19-5), 1:20 p.m.: The Lava Bears make their first appearance at the final site since 2010 and are poised to make it an all-Central Oregon state final for what would be the third time in five years. Bend won 16-4 over No. 6 Ashland in last Thursday’s quarterfinals, as Ian Marks exploded for nine goals in the victory. Jackson McMuldren has been a wall in goal for the Bears, finishing with 12 saves against Ashland. Hood River Valley comes off last week’s 27-9 win against No. 7 North Eugene, during which nine players scored for the Eagles, including three who finished with at least five goals. J.J. Mears led Hood River Valley with six scores.

Girls semifinals, No. 2 Summit (15-8) vs. No. 3 Sandy (7-7-1), 3:40 p.m.: Summit has been a mainstay at the final site over the past five years, yet the program boasts just one state title. With Gillian Fritz, a first-team all-tournament selection last year, patrolling goal, Summit is primed to make a run at its second state championship. The Storm won 16-1 over No. 7 North Eugene in a quarterfinal last Thursday, when Conner Hamlin scored five goals for Summit. The Storm have placed second at state three times since 2012 and won the title two years ago. To advance to the championship match, Summit will need to get through Sandy, a semifinalist for the second straight year. The Pioneers, third at state last season, won 12-2 against No. 6 Ridgeview last week. In that quarterfinal match, Hana Wigzell, a first-team all-tourney player last year, scored three goals.

— Grant Lucas, The Bulletin