 Prominent Bluegrass groups, including Bill Monroe, the Gibson Brothers, and Rural Delivery, have performed at Darrington's Whitehorse Mountain Amphitheater.Since 2006, the amphitheater has also been used to host the Summer Meltdown jam festival in early August, which attracts a wide variety of musical acts.The four-day event typically draws 4,000 visitors and 40 acts, as well as art pieces that are installed around the campgrounds.