Aftershock Festival is a hard rock and heavy metal festival that takes place in Sacramento, California. The festival was started in 2012 and has been active since then, except for a break in 2020 due to the COVID-19 pandemic. In 2019, the festival expanded to three days, and in 2021 it expanded to four days. The festival features over 95 bands, including headliners Guns N’ Roses, Tool, Avenged Sevenfold, and Korn. Other notable bands that have performed at the festival include Stone Temple Pilots, Deftones, Bush, Chevelle, Theory of a Deadman, and many more. The festival is held at Discovery Park in Sacramento, and attendees can enjoy a variety of onsite food and beverage offerings curated by Southern Hospitality Concessions LLC. The festival is an outdoor event, and the lineup, schedule, and set times are subject to change. The festival has attracted fans from all over the world, with more than 65% of attendees coming from outside the Sacramento region.