The Yellowstone Bugler is a position held by an individual who is responsible for playing a bugle to signal the start and end of the day in Yellowstone National Park. The job title is abbreviated as ELK, which stands for 'Every Lodging Keeper'. The Yellowstone Bugler is a tradition that dates back to the early 1900s when the park was first established. The bugler's call is a reminder of the beauty and grandeur of the park and its wildlife.