Contact the Downhill Super Series

Three certified net-downhill races.

No 5-minute Boston Qualifier penalty.

Built for PRs and breakthrough performances.

America’s Fastest Downhill Marathons & Half Marathons

Runners Exiting the Snoqualmie Tunnel at the Super Marathon and Half

Fast net Downhill marathon and half through the Snoqualmie Tunnel NO bq penalty under 1500'

June 13

~1,300+ ft net elevation loss.
Certified, fast rail-trail course.
Iconic Snoqualmie Tunnel miles.
Peak early-summer BQ & PR opportunity. No BQ penalty.

Super Hyak website

Register Super HYAK

July 25 & 26

~1,400+ ft net elevation loss.
No 5-minute Boston Qualifier penalty.
Snoqualmie Tunnel experience.
Mid-season speed & fitness race.

jack & jill website

Register Jack & jill

Runner Exiting Snoqualmie Tunnel at Hyak Sno Park to North Bend Downhill Marahthon & Half

September 12

Late-season PR opportunity.
Cooler race-day temperatures.
Net-downhill certified course.
Ideal for final BQ & PR attempts. No BQ penalty.

Cascade express website

Register Cascade express

Built for Speed. Designed for Breakthroughs.

• No 5-minute Boston Qualifier penalty
• Certified net-downhill courses
• ~1,300–1,500 feet of net elevation loss
• Smooth, fast rail-trail running surfaces
• Flat early miles + long gradual downhill finish
• Built for negative splits and fast times
• Marathon & half marathon options
• Professional race production by Run Super Series
• Live tracking & Mile Splits
• Scenic Pacific Northwest mountain routes
• Three race weekends to choose from each year

Why Downhill Marathons Work

Downhill marathon courses are popular with runners chasing Boston Qualifiers and personal records. Net-downhill elevation profiles help runners conserve energy early and push hard in the final miles. In particular, ours offer a flat upper course experience to dial in your pace, followed by an opportunity to let it rip on the true downhill finish 13-16 miles. Don’t burn out early, conserve, then crush.

The Downhill Super Series delivers three of the fastest downhill marathon and half marathon courses in the Pacific Northwest-with three race weekends to choose from each year.

Races Worth Traveling For

Run through the iconic Snoqualmie Tunnel and scenic mountain forests of Washington State.

The Downhill Super Series offers destination-worthy race weekends built around performance, speed, and unforgettable Pacific Northwest scenery.

Ready to Run Fast?

Choose your race weekend and secure your spot before sell-out.

Ready to Run Fast?

The Downhill Super Series is produced by Run Super Series, celebrating 10 years of professional race production in the Pacific Northwest. From Boston Qualifiers to destination race weekends, our events are built for performance, safety, and an exceptional runner experience.

Explore our full race calendar at RunSuperSeries.com.

Celebrating 10 Years • 2016–2026

Learn more

View all Run Super Series Events