Wiktionary
rockfest
n. (context informal English) A rock music festival.
Wikipedia
Rockfest
Rockfest is an outdoor, hard rock music festival held annually at the Liberty Memorial by Kansas City radio station KQRC-FM 98.9 the Rock since 1992 1. As of 2010, it was considered to be North America's largest one-day music festival. Major bands such as Godsmack, Staind, Seether, Stone Temple Pilots, Korn and Alice in Chains have all headlined Rockfest.2 The large size and rain or shine ethos of the concert has led to community disputes regarding its continuation.