Kaiser Permanente Seattle to Portland Presented by Alaska Airlines

Text reads: Save the Dates. Seattle to Portland Bicycle Classic on July 13 and 14, 2024. Background images shows two riders zooming past a watertower and firetruck.

Sat.-Sun. July 15-16, 2023.

5 a.m. to 9 p.m. Sat.

6 a.m. to 7 p.m. Sun.

Start Location

E18 Parking Lot, University of Washington, Seattle (map)



203.9 mi. 5,100 ft. Rolling hills with a notable climb.

Adult (non-members): $180-$200
Adult (members): $160-$180
Youth (18 and under): $70

Reduced rates available (apply here)

Not a member? Join now.


Event has already happened

Event Description

The Kaiser Permanente Seattle to Portland Bicycle Classic presented by Alaska Airlines is a 206 mile ride through western Washington. Heading south from Seattle and ending in Portland, Oregon, STP is a thrilling back-to-back double century ride through urban and rural settings. Riders have the option to choose between riding this event in one or two days.

This event is a fundraiser for Cascade Bicycle Club's programming in advocacy, education, and community rides, such as the Major Taylor Project, Let's Go, Your Streets Your Say, and Pedaling Relief Project.

Packet Pickup

If you registered by June 28, your packet was mailed out the week of July 3 to the address listed in your user profile.

If you registered after June 28, your packet will be available for pickup at the start line on Friday evening or Saturday morning.

Please see us at the green Cascade tents at the start line if you have lost your packet.

Event Communications

Stay in touch by subscribing to our newsletter in the menu above.

Did you only recently register? You can read previous emails to riders here:


Registration is now closed. There is no in-person registration available on the day of the event. You must register online. No exceptions will be made.

Register by June 28 and your rider packet will arrive the week before the event. If you register between June 29 and July 9, your packet is available at the start line.

Your registration fee covers your entry, access to rest stops, ride support, baggage truck service, a meal at the finish line, and an STP finisher T-shirt. Parking, bus passes, and bike transport sold as add-ons. Early start line bag & bike drop are purchased on location on the Friday before STP. Lodging arrangements are made directly with hosts.

STP jerseys can be added to your order or pre-ordered directly from the apparel shop starting July 8. As of 6/22, additional jersey orders are currently on hold. Jerseys pre-ordered July 8 or later will ship in August, after the event.

Limited to 6,000 riders.


The route is 203 miles long. 

Map below subject to change. We encourage you to wait until the day before the event to download these maps to your preferred device for easy access on the day of the event. 

Printed cue sheets are available at the start line tents. The route is marked with navigational markings on the road surface.

NEW for 2023

The Lewis and Clark Bridge in Longview will remain open during the event, however, on Sunday riders must be ready and queued up for the last crossing at 2 p.m. to be escorted and cross the bridge. The bridge will be closing that afternoon for maintenance. As there is no other practical alternative across the Columbia River nearby, please schedule your day accordingly.

Event Schedule

Friday Opens Closes
Early Packet Pickup 6:00 p.m. 9:00 p.m.
Early Bag Drop 6:00 p.m. 9:00 p.m.
Packet Pickup 4:45 a.m. 7:15 a.m.
Bag Drop 4:45 a.m. 7:15 a.m.
Start Line - One-Day Riders 5:00 a.m. 5:30 a.m.
Start Line - Two-Day Riders 5:30 a.m. 7:30 a.m.
Course Support 5:00 a.m. 9:00 p.m.
Finish Line 3:00 p.m. 9:00 p.m.
Course Support 6:00 a.m. 7:00 p.m.
Finish Line 10:00 a.m. 7:00 p.m.

Icon featuring an airplane, a bus, and a trainTransportation

Pre-Ride Bus

For riders in the Portland area, the Portland Bicycling Club arranges buses and trucks to deliver you to Seattle on Friday, the day before the ride. Please see their website for more information. These can be purchased as add-ons when you register. Space is limited to 200 passengers and parking capacity is limited to 100 vehicles.

Service Price
Friday Bus Only $50
Friday Bus & Bike Transport $100
Parking at DoubleTree $40

Post-Ride Bus

Important deadline: June 24, 2023 is the last day to purchase all bus tickets: Friday bus from Portland to Seattle before the ride and the return buses to Seattle after the ride.

Transportation from Portland to Seattle for you and your bike from the finish line can be purchased as add-ons to your registration. Buses are available on Saturday, Sunday, and Monday to return you to to the University of Washington in Seattle. You can also purchase separate truck transportation for your bike. If you are returning home by air or train, purchase delivery of your bike box to the finish line.

Service Price Deadline to purchase
Bus & Bike Transportation $100 SOLD OUT
Bike-Only Transportation $60 SOLD OUT
Bike Box Transportation $20 --
Bike Storage $20/day N/A
UW Start Line Parking $15/day --

See full transportation details

Are you flying to or from PDX or SEA airports for STP? Our sponsor Alaska Airlines is offering you a 10% discount when you fly between July 13 and 18. Family and friends on the same travel itinerary are included. Purchases can be made between January 10 and July 18.

How do I get a discount code? When you register for STP, you’ll check a box to obtain a code, which we will send to you shortly thereafter.


Everyone is welcome at Cascade events. We are committed to celebrating and promoting diversity in the bicycling community. We aim to provide safe spaces at start lines, finish lines, and official rest stops. Read our commitment to anti-racism and our participant code of conduct and grievance policy.

We would like to acknowledge that our rides take place on native land. Our offices are located on the traditional land of the first people of Seattle, the Duwamish People past and present.

Food & Breaks

Four official rest stops are located at miles 20, 54, 146, and 176. A full selection of snacks, fruit, and PB&Js are available to riders.

One-day riders will have an additional lunch stop on Saturday.

Thirteen official mini-stops are located throughout the course.

Many unofficial rest stops pop up along the route and you are welcome to enjoy them. 

Where to Stay

You must arrange for your own lodging at the start line, mid-point areas, and at the finish line as needed.

The University of Washington offers dorm rooms on Friday night near the start line.

Are you a two-day rider looking for mid-point lodging?  Lodging will be available through Centralia College, the Centralia-Chehalis Chamber of Commerce, and other community organizations between the 100- and 150-mile marks. Lodging ranges from private rooms to tent and RV camping. Don't miss out on Alaska Airlines Layover Lounge hassle-free, pre-assembled tent camping.

DoubleTree and Hyatt Regency offer promotions for STP riders adjacent to the finish line in Portland.

See full lodging details

Support During the Ride

This ride is supported by Cascade staff and volunteers, local community group volunteers, and municipal and county services.

Support and gear (SAG) vehicles are present on the route and dispatched when you call the ride support hotline. SAG vehicles can transport you and most models of bikes in the event of a mechanical or minor medical event. You should always call 911 in a life-threatening emergency.

Outriders are volunteers in white, green, and black jerseys that ride on the route, assisting you with minor mechanical and minor medical issues, like cuts and scrapes, dispensing advice and directions, and helping you to Ride S.M.A.R.T. 

Medical riders are volunteers on bike in red and blue jerseys that can assist you with minor medical issues like cuts and scrapes, dehydration, sprained joints, and other non-life threatening issues. 

Mechanics are posted at the start line and at most official rest stops.

Traffic officers are posted at highway crossings. Traffic officers will direct riders across the Longview Bridge into Oregon on Sunday only. 

We ask that personal support vehicles please stay off of the STP route. Riders should plan to meet with personal support vehicles away from the route to prevent unsafe interactions with rider traffic.


July weather can bring many things: rain, extreme heat, and lots of sun. Morning temperatures may vary drastically from midday temperatures. Wear or bring layers to have available on your bike with you,

Get your bike tuned up and in shape to ride in slick, rainy, low-visibility conditions. Bring front and rear lights, backup batteries, install fenders, service your brakes, and clean your chain.


Class 1 and Class 2 e-bikes are permitted on this ride, which utilizes multi-use trails.


The Cascade Training Series is a twelve-week ride series designed to prepare you for STP. Riders of all paces will not only building their strength and endurance, but also their confidence.

To help you prepare for this ride, you can also check out our extensive schedule of Free Group Rides in the Puget Sound area. Find rides that fit your schedule and desired pace and distance. 

Training on your own? Use this handy Google Sheet to plan your rides and track your progress.

plane iconAlaska Airlines Miles for Miles Sweepstakes

Alaska Airlines is giving away 100,000 miles to one lucky STP rider again this year. To participate, locate as many Alaska Airlines Sweepstakes posters as possible along the route, take a selfie that includes the poster, tag #MilesForMiles and @cascadebicycle in a main feed Instagram post! One lucky winner will be selected on or around July 18, 2023 by a random selection system. See the sweepstakes rules for details.