The first STP took place in 1979 and was a race . The ride has taken place every year since , including 1980 when the route was changed because of the eruption of Mount St. Helens , also ending in Seattle . Also in 1980 a new ride became the annual Ride from Seattle to Vancouver , BC and Party ( RSVP ) . The following year Cascade Bicycle Club changed the event from a race to " recreational ride " . Jerry Baker from Seattle was the winner of the first STP race . Baker , and Paul Wantzelius from Maple Valley , Washington , were the only riders who attended every consecutive STP , until their deaths , Wantzelius in 2010 and Baker in 2015 . Despite being a cycling event people have taken part on unicycles , inline skates and two skateboarders have done it using a technique known as long distance skateboard pumping
eruption of Mount St. Helens
1980 eruption of Mount St. Helens
Seattle to Portland Bicycle Classic