The public high school serves students from the north west section of the city.

In 1910, Visalia Union High School was constructed in the style of Mission Revival architecture.

The original "Senior Court" was moved, from where the present library and memory lane are now located, to the quad area.

In that same year, the 50th Cowhide game against its cross town rival, Mount Whitney High School, was celebrated at the Mineral King Bowl and televised throughout the California Central Valley.

The gym was remolded for a duration of 50 weeks (11.5 months) and was reopened the student body in mid May 2023 after multiple delays.

The Sierra Vista campus is made up of a few portable classrooms, a main building, a theatre, and a baseball diamond.

The library is decorated with 35 flags from around the world, photographs of students dating back to 1900, and a preserved Golden Eagle.

It was named for Mr. Lawrence J. Williams, former instructor and principal of Visalia Union High School and the first President of College of the Sequoias.

[citation needed] Redwood competes in the California Interscholastic Federation (CIF), Central Section Division II, East Yosemite League (EYL).

Whitney High School during late October and is held at the Mineral King Bowl.