See great Background Article at BikePortland.org
Here is the video description from YouTube: http://www.youtube.com/watch?v=SVWP6VaLtvw&
This segment, Klunking, is from the late 1970s, hosted by Steve Fox, and comes from the Paul Colardo (an Evening Magazine crew member) collection. This is one of the first segments that Paul produced. Steve Kotton was the cameraman on this shoot and remember having to climb up the steep hillside. There was also a lawsuit against KPIX brought by one of the riders. He claimed that the camera crew were in the middle of the road and he crashed. He lost the lawsuit because the video clearly showed the side of the track location of the crew. It is believed this piece was edited by Jim Farney. Segments from the original Evening Magazine are brought to you courtesy the School of Multimedia Communications archive at the Academy of Art University in San Francisco and Jan Yanehiro. These video pieces are under the ownership and copyright of CBS Television.