The Palo Alto High School Vikings (15-8, 1-5) fell to the Mountain View High School Spartans (15-8, 3-3) in five sets, 21-25, 25-18, 21-25, 25-16 and 7-15. They will face the best league-record team Los Altos High School at 6:45 p.m. on Thursday on the road for the annual “Dig Pink” event that raises breast cancer awareness.