Q: Context: High School Musical was filmed at East High School located in Salt Lake City, Utah, the auditorium of Murray High School, and Downtown Salt Lake City. Murray High School was also the set of several other Disney productions: Take Down (1979), Read It and Weep (2006), Minutemen (2008), and High School Musical: Get in the Picture (2008). In January 2016, cast members Vanessa Hudgens, Ashley Tisdale, Lucas Grabeel, Corbin Bleu, and Monique Coleman reunited in a Los Angeles high school gym (decorated to resemble the gym used in the film) to celebrate the film's tenth anniversary. Zac Efron was unable to attend but instead sent in a short video of himself giving acknowledgments toward the cast, crew, and fans of the film.

Question: where was the first high school musical filmed? Let's give stream of consciousness first:
The relevant information to answer the above question is: High School Musical was filmed at East High School located in Salt Lake City, Utah, the auditorium of Murray High School, and Downtown Salt Lake City. Therefore, the final answer is East High School located in Salt Lake City , Utah , the auditorium of Murray High School , and Downtown Salt Lake City.