1054 Oak Harbor
Tahoma had a huge, huge win last time out (284 points out of a maximum 287), which catapulted them into first place. Conveniently, both teams have the same exact 4th-highest score (253), so it's pretty easy math. Oak Harbor needs at least 15 more points than Tahoma and a score of 268 or higher. And this isn't impossible: it happened at Putney Woods.
1002 Lake Washington
This one is pretty close! Head-to-head this season, Lake Washington leads 3-2-1. They are up just 3 points, but Spanaway's 4th highest score is 5 points lower, meaning that it's possible that Spanaway loses the battle (barely), but wins the war (barely). Curtis High School is mathematically alive, but they need no worse than a 1st, 3rd, and 6th in the final race, and well, that ain't happening (best individual finish is 9th).
Let's also pretend that Liberty High School consisted of Tyra, Siri, and a hypothetical girl that finished dead last in every race, but didn't mispunch. This team would have already clinched the championship! (And it's very possible that they would win the championship with the hypothetical girl showing up just three times).
JV Boys South
Bethel and Tahoma have been pretty close all season, with the last 5 races scoring within 5 points of each other. But wow, Bethel is riding that smackdown in the first race (24 point win over Tahoma)! Tahoma needs a 1st, 2nd, and 5th to force the issue, and I don't see that happening.
JV Boys North
1098 Lake Washington clinched
These guys clinched it with 4 solid wins from the first 5 races.
1051 Oak Harbor clinched
Only two schools have maximum runners so far (3 runners in 4 different races), and Oak Harbor is the better or the two.
1138 Woodinville Montessori clinched
WMS wins again, but there are 4 competitive teams in this division, with 2nd through 4th currently separated by just 11 points.