Tri-valley High School - Class of 1966 Alumni, Colton SD

Join thousands of alumni from Tri-valley High School and the Class of 1966. Reconnect with classmates, photos, yearbooks, upcoming reunions.

Varsity Football Schedule 2026-27

08/27 vs Milbank
09/03 vs Madison
09/10 vs Lennox
09/24 vs Custer
10/08 vs Dell Rapids
10/15 vs Beresford
10/21 vs Sioux Falls Christian

Upcoming Class of 1966 Reunions

Browse past reunion events and photos for your class here.

Past Class of 1966 Reunions

Browse past reunion events and photos for your class here.

Tri-valley '66 Apparel

Browse our apparel store for a wide range of Mustangs gear, from t-shirts and hoodies, to caps and accessories.

Class Yearbook

View past yearbooks

Recently joined '66 Classmates

Karen Houlihan
Class of 1966

Nearby Tri-valley Classmates

Class of 1968

21 classmates have joined

View Class of 1968 Alumni