It was located in the Mendenhall Valley section of Juneau and drew most of its students from this area, although under an open enrollment policy, all high school students in the district could attend any of the three high schools.

For athletics, Thunder Mountain was classified as 4A, which includes the largest high schools in the state.

[3] In March 2024 the Juneau School Board voted to continue with a previous decision to close TMHS as a high school due to the board's financial deficit.

[4][5] Fall Sports: Football, Football Cheer, Cross Country Running, Tennis, Swim/Dive, Volleyball, Dance, Rifle, Drama Debate and Forensics, Robotics, Wrestling Winter Sports: Basketball, Basketball Cheer, Pep Band

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