In the hall of the mountain king is part of the work Peer Gynt. The whole thing is about 2 hours, but there’s a shorter version consisting of two suites which is about 30 minutes long. Here’s a version with some extra incidental music included at the end - here’s a performance of just the first suite.
In the Hall of the Mountain King by Edvard Grieg. It’s not that long though.
In the hall of the mountain king is part of the work Peer Gynt. The whole thing is about 2 hours, but there’s a shorter version consisting of two suites which is about 30 minutes long. Here’s a version with some extra incidental music included at the end - here’s a performance of just the first suite.