WLUP, also known as "The Loop," is a radio station based in Chicago, Illinois. It operates at the frequency of 97.9 FM and is known for its rock music format. WLUP has a rich history, having first launched in 1977 and becoming a popular station for rock enthusiasts in the area. The station has undergone various ownership changes and format shifts over the years. WLUP is recognized for its influential role in the Chicago music scene and has featured many notable DJs and programs. It has also been associated with events and promotions that celebrate rock music and local artists.