The Westlake High School Marching Band, also called the Marching Thunder, is a high school marching band from Saratoga Springs, Utah.

They were the 4A State Champion in 2012 with their show Making of a Masterpiece and they took 10th place at the St. George Bands of America regional. They took a second championship in 2014 with Our Town and placed fourth at the St. George regional. They placed fourth again at St. George with the show The Witch and the Saint. With their show "Black Tears", they were a Bands of America regional finalist at the St. George regional and the American Canyon, CA regional, taking 7th place in St. George and 9th in American Canyon. They also placed third in the St. George preliminaries.

The Marching Thunder were invited to be the Utah representative to march in the Pearl Harbor Memorial parade in December 2014.