Sinagua High School - Class of 1900 Alumni, Flagstaff AZ

Join thousands of alumni from Sinagua High School and the Class of 1900. Reconnect with classmates, photos, yearbooks, upcoming reunions.

Upcoming Class of 1900 Reunions

Browse past reunion events and photos for your class here.

Past Class of 1900 Reunions

Browse past reunion events and photos for your class here.

Sinagua '00 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

Connect with Class of 1900 Classmates

Gaige Haskell