Philstock?

According to the Philadelphia Inquirer, a multi-stage, multi-day music festival has been proposed for next summer in Fairmount Park. C3 Presents - based in Austin (TX) - and producers of Austin City Limits and the Lollapalooza festival in Chicago, has been recommended by the Fairmount Park Conservancy to produce the festival, which would take place over three days on Belmont Plateau.