America’s Most Iconic Downhill Marathon Weekend
July 25–26, 2026
Snoqualmie Pass, WA
~1,100’ Net Downhill | USATF Certified
The Downhill That Sends Runners to Boston.
Jack & Jill Marathon and Half
America’s Most Iconic Downhill Marathon Weekend
Race the iconic Snoqualmie Tunnel on a fast, net-downhill course built for Boston qualification and breakthrough performances.
Net downhill.
Boston Marathon qualifying eligible.
No BQ time penalty.
Built for breakthrough performances.
Abbott World Marathon Majors Age Group World Rankings Qualifier
Jack & Jill is an official AbbottWMM Age Group World Rankings qualifying event — placing your performance on the global stage.
Engineered for Speed
• ~1,300’ sustained descent
• ~1,100’ Net Downhill – USATF Certified
• Boston Marathon qualifying eligible
• No downhill time adjustment
• Proven PR course design
• Two-day marathon & half weekend
• Professional timing + LIVE tracking
• Experienced pacers
When seconds matter, course design matters.
Why Run Jack & Jill
Jack & Jill is the downhill marathon weekend that sends runners to Boston. Built for peak summer fitness and sustained downhill pacing, this is where training converts into qualification.
• Iconic Snoqualmie Tunnel miles
• Smooth, fast rail-trail surface
• Proven Boston-qualifying results
• Mid-summer peak performance timing
• Built for negative splits & confident finishes
What Runners Say
BQ and PR!! Boston 2026 here I come💙🦄💛 Jack and Jill was my race to get a larger buffer. - Carolyn
BQ last July at Jack and Jill, Boston 2026 here I come! I love running this course, I would run it just for the peace and tranquility the course provides. P.S. - I love the tunnel, part of the experience. - Jon
"The finish line was awesome! They announce your name and let you know if you qualified for Boston. The crowd was amazing at the finish. And yes, I rang that PR bell with Pride! Would I run this marathon again? Absolutely!" - Annie
"This was an incredibly well organized race and packect pickup"
The Course & the Snoqualmie Tunnel
Jack & Jill begins at Hyak and passes through the iconic Snoqualmie Tunnel before descending through sustained downhill miles designed for confident pacing and strong finishes.
The smooth rail-trail surface and consistent grade allow runners to settle into rhythm and negative split with control.
Scenic. Strategic. Fast.
• 2+ mile Snoqualmie Tunnel segment
• Smooth, hard-packed rail-trail surface
• Sustained, runnable downhill grade
• Wide trail with minimal turns
• Finish in North Bend with strong closing miles
Ready to Run Your Fastest Summer Race?
Peak fitness. Sustained downhill speed. Proven Boston qualification results.
Jack & Jill typically sells out — secure your start line before race weekend fills.
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
Professionally Produced by Run Super Series
Celebrating 10 Years of Race Production
Jack & Jill Marathon & Half is produced by Run Super Series, a Pacific Northwest race organization celebrating over a decade of fast, runner-first event production.
Established 2016.
