# Mountain West High School Football: Who’s Up, Who’s Down

> Three teams clinched region titles while three others plummeted into playoff chaos.
- Title: Mountain West High School Football: Who’s Up, Who’s Down
- Summary: Three teams clinched region titles while three others plummeted into playoff chaos. Mountain West high school football teams secured region championships and…
- Keywords: mountain west, high school football, region 5 championship, box elder, thunder ridge, clark willow lake, american fork, billings senior, killdeer, utah 6a playoffs, class aa playoffs, sports
- Source: High School On SI — https://si.com/high-school/mountain-west-high-school-football-who-s-up-who-s-down-across-the-region-oct-19-2026-01m59g4aat7p
- Published: 2026-10-19T15:31:09+00:00
- Read time: 1 min
- Topics: mountain west, high school football, region 5 championship, box elder, thunder ridge, clark willow lake, american fork, billings senior, killdeer, utah 6a playoffs, class aa playoffs, sports
## Three Up
High School On SI highlights three teams that won region championships this weekend.

> I couldn’t be prouder of (my players) tonight
## Box Elder (UT)
Box Elder won their first outright Region 5 championship since 2003 with a 28-7 victory over West Field.

> They’ve wanted this for a long time, and they put together an exceptional performance
## Thunder Ridge (ID)
Thunder Ridge ended a five-year losing streak to Madison with a 21-20 victory.

> getting a 3-yard touchdown run from junior Tayt Nelson with 49.5 seconds remaining
## Clark/Willow Lake (SD)
Clark/Willow Lake completed their first undefeated regular season since 2009 with a 14-7 win over Deuel.

> Joey Ries’ 9-yard touchdown pass to Jakob Steen with 18 seconds left
## Three Down
High School On SI highlights three teams that faced playoff setbacks this weekend.
## American Fork (UT)
American Fork dropped to a three-game losing streak after a 21-15 loss to Skyridge.

> they fell behind 14-0 early and never recovered
## Billings Senior (MT)
Billings Senior fell to 0-8 after a 42-3 loss to Great Falls.

> going winless in a season
## Killdeer (ND)
Killdeer finished 1-7 after a coaching change and a 48-6 loss to Central McLean.

> they returned only three starters and underwent a coaching change
## Next Week
High School On SI will return each week with Three Up, Three Down from the Mountain West region.
## Key takeaway

Mountain West high school football teams secured region championships and playoff seeds while others faced losing streaks and coaching changes.