OLYMPIA — Drivers should plan for extra travel time Saturday and Sunday when 8,000 bicyclists ride western Washington’s state highways and roads for the 2019 Kaiser Permanente Seattle to Portland Bicycle Classic. 

Bicyclists are expected to ride through Thurston and Lewis county at mid-morning to afternoon Saturday on SR 507.

The Washington State Department of Transportation asks motorists to prepare for travel delays during the popular ride. As state driving laws periodically change, drivers may want to review the state driver guide and the driving among bicyclist sections.

Bicyclists should also be aware of their responsibility to follow Washington’s bicyclist rules of the road. 

The Cascade Bicycle Club distributes a free pocket guide about state bike laws with support from the Share the Road license plate sales. To request a copy of the guide, email: 

The STP route follows state highways and local roads in these areas:

• State Route 513 – University of Washington Montlake Boulevard parking lot to Northeast Pacific Place

• SR 181 – West Valley Highway in Kent

• Puyallup area county roads and city streets

• SR 7 – near Spanaway 

• SR 507 – Roy to Centralia

• SR 507 and Higgins Greig Road/Fourth Street East – Roy 

• SR 507 and Third Street – Yelm

• SR 507 and Mosman Avenue – Yelm

• Centralia and Chehalis city streets

• County roads - Napavine to Winlock to Vader

• SR 506 – Vader area

• West Side Highway (becomes SR 411) – Vader to Castle Rock area

• SR 411 (also known as West Side Highway) – Castle Rock to Longview

• SR 432 – Longview industrial area 

• SR 433 – Crossing Lewis and Clark Bridge into Oregon. 


For more information, visit the Cascade Bicycle Club STP page, which includes a route map.

STP organizers, WSDOT and law enforcement will work together to direct bicyclists, drivers and pedestrian traffic.

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