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Logo for Cascade Express Marathon & Half featuring stylized mountain peaks.

September 12, 2026
Snoqualmie Pass, WA
1,247’ Net Downhill | USATF Certified

#5 Fastest Boston Qualifier in the Nation

Secure Your Spot

Cascade Express
Marathon & Half

Ranked #5
Fastest Boston Qualifier Course in the Nation

Run one of America’s fastest nationally ranked Boston Qualifier courses on the legendary Snoqualmie Tunnel corridor.

Net downhill.
Boston Marathon qualifying eligible.
No BQ time penalty.
Built for breakthrough performances.

Register Here

Engineered for Speed

• ~1,414’ total descent

• ~1,247’ net downhill
• Boston Marathon qualifying eligible
• No downhill time adjustment
• Sustained net-downhill profile
• Late-season peak fitness timing
• Professional timing + LIVE tracking
• Experienced pacers

When seconds matter, course design matters.

Why Run Cascade Express

• Iconic Snoqualmie Tunnel miles
• Smooth, fast rail-trail surface
• Late-season peak fitness timing
• Cooler fall race-day temperatures
• Built for negative splits & breakthrough finishes

Fall timing, cooler temperatures, and peak fitness.

Just fast, certified racing.

Lock in your fast fall marathon or half, without waiting, guessing, or compromises.

This is downhill done right.

What Runners Say

“Cascade express marathon 2025- This race was a gem. The course had some of the most breathtaking views, quiet, scenic, and fast. Big shoutout to Jess and Sabrina for being super responsive with my pre-race questions. Aid stations were spot-on. Volunteers held blue-striped cups for water, which made it easy to pick. Gatorade was available too, but I appreciated the clarity, no guessing, no fumbling oh the best part - I am going to Boston because of this marathon” -- Biswanath

“Smooth packet pickup, nice race shirt medal and bag, good weather, aid stations every 2 miles! Qualified for Boston at Cascade! The people working this event were very kind! Thanks for having me in your great state of Washington!” Courtney

“I have run many super series events over the past year and have had a great time at each one. They are all very well planned, coordinated, and executed. You can tell that they care about your experience and put in the effort to make sure you have a great time!” - Justin

The Course & the Snoqualmie Tunnel

Cascade Express follows the same proven net-downhill course as Super Hyak, descending from the world-famous Snoqualmie Tunnel through sustained mountain terrain designed for controlled speed.

Scenic. Strategic. Fast.

Learn more

Ready to Run Your Fastest Fall Race?

Peak fitness. Fast downhill miles.

One shot at your BQ or PR. Fall racing means:

• Cooler, faster conditions
• Peak endurance fitness
• Final BQ attempts before registration windows
• Fewer hot-weather variables

Cascade Express is built for runners ready to convert fitness into performance.

Register Here

Part of the Downhill Super Series

Cascade Express Marathon & Half is part of the Downhill Super Series — a collection of nationally recognized, net-downhill races built for speed and Boston qualification.

The Series Includes:

Super Hyak Marathon
June 13
Ranked #22 Nationally for Boston Qualifying

Jack & Jill Marathon & Half
July 25 & 26
Ranked #35 Nationally for Boston Qualifying

Cascade Express Marathon & Half
September 12
Ranked #5 Nationally for Boston Qualifying

Downhill Super Series

Professionally Produced by Run Super Series

Celebrating 10 Years of Race Production

The Run Super Series is a collection of professionally produced events across Washington State.

Established 2016.

Run Super Series Events
Two runners participate in a race on a gravel path with a mountain and green forest background, one woman in black and one man in bright clothing.
A male runner with a pink bib number 513 crossing the finish line of a trail race called 'Run Super Series', in a forested area with spectators watching.
A group of runners participating in a marathon passing through a tunnel, with the lead runner wearing a white tank top and black shorts, during daytime surrounded by green trees.
A man running in a marathon on a gravel trail with posters on the ground, under a tunnel with greenery around. The man wears a gray sleeveless shirt, red shorts, and sunglasses on his head.
A male runner crossing the finish line at a trail race, smiling and making peace signs with both hands, with a crowd of spectators applauding in the background, and a black inflatable arch with white text that reads 'RUN SUPER SERIES'.
A young woman running on a gravel trail through a green landscape, smiling and holding a phone during a race.
Two women running on a gravel trail through a forested area, with several others running in the background, during daytime.
A man running outdoors on a forest trail during a race, wearing a black Adidas t-shirt, yellow shorts, a black cap, and a race bib number 1160 from Cascade Express Half 2024, smiling.
Two shirtless men running on a dirt trail through a forest, with more runners visible in the background. One man is wearing red shorts and the other is wearing black shorts.
Two women running outdoors on a trail surrounded by trees, smiling and holding snacks.
Group of runners participating in a trail race on a dirt path through a wooded area, with green foliage on either side.
Two runners participate in a trail race on a dirt path surrounded by greenery. The woman in the foreground wears a red shirt, black shorts, and a cap, with a race bib numbered 1356, smiling and pointing in different directions. The man behind her wea
A female runner in a black outfit running towards the camera, crossing the finish line of a trail race through a forested area. She has her arms raised in celebration, surrounded by spectators on both sides of the trail, some clapping and cheering. T
A woman in athletic clothing celebrating as she crosses the finish line at a trail running race in a wooded area, with spectators and race officials on the sides.
Female runner crossing the finish line in a forest during a race, with spectators on both sides and an inflatable archway reading 'RUN SUPER SERIES'.
A male runner wearing an orange tank top, black shorts, and a blue cap, crossing the finish line of a trail race in a wooded area, with a digital timer showing 3 hours, 4 minutes, and 5 seconds. He is smiling, raising both hands in celebration, and w
A man running and smiling as he crosses the finish line at a trail race in a forested area. He is wearing a gray tank top, blue shorts, and a race bib number 51. The finish line is marked by a black inflatable arch with the words "RUN SUPER SERIES."
A woman running and celebrating crossing the finish line at a trail race in a forested area during the daytime. She is wearing a black tank top, black shorts, running shoes, and a colorful headband. There are other runners and spectators in the backg
Female runner crossing finish line at an outdoor trail race, wearing a red athletic outfit, with a smile and arms raised in celebration, in a wooded area during daytime.
A female marathon runner wearing neon green shorts, white running shoes, and a black sports bra, running on a dirt trail near a body of water during sunset, with pine trees and mountains in the background and a trail bib numbered 344. The image featu
A woman running outdoors at sunset, with mountains in the background, wearing glasses, a sleeveless top, black shorts, and a fitness tracker on her wrist, participating in Cascade Express marathon or half marathon.
Group of runners participating in a race along a dirt trail surrounded by trees and mountains during sunset
Group of marathon runners on a gravel trail near a river, with a woman in foreground making a peace sign, wearing a bib number 320, smiling, at sunset, with forested hills and power lines in the background.
Group of runners participating in an outdoor trail race near a lake, with mountains and trees in the background during dusk, with a Cascade Express logo in the lower right corner.
A woman in a blue shirt and black shorts running along a gravel trail during a marathon, with other runners further behind, tall trees on the right, a body of water and mountains in the background, during sunset, with a logo for 'Cascade Express Mara
A group of runners participating in the Cascade Express marathon or half marathon, running along a gravel trail beside a river with forested mountains in the background during sunrise or sunset.
A group of runners participating in a trail race along a dirt path beside a body of water, with forested hills and a sunset sky in the background. The woman in the foreground is smiling, raising her arm, and holding a yellow water bottle.
A group of runners participating in a trail race through a forested area during daytime. The runner in front is smiling and wearing a blue tank top, orange shorts, and neon yellow shoes, with bib number 211. Others are behind him near orange cones al
 

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