Hippies, mud dancing, big name rock and roll bands — you’ve heard about Woodstock, but what about the music festival that came before? Knute Berger takes a trip down memory lane to the mother of all music festivals in the Pacific Northwest. Over Labor Day weekend of 1968, the sleepy logging town of Sultan, Washington played host to the Sky River Rock Festival and Lighter Than Air Fair. Tens of thousands of hippies showed up.