Cascade Express Marathon & Half Marathon

Come join us for the Blake Pottle Foundation's 5th Annual "Opt Outside to Fight Cancer" Run/Walk 5K. The race is in remembrance of Blake Pottle, all proceeds to benefit the Blake Pottle Foundation. The Blake Pottle Foundation seeks to provide funding, awareness, and support to those affected by cancer. The Foundation will identify opportunities to partner with healthcare and community organizations to further cancer research, prevention and detection with an overarching goal of making a lasting impact in the fight against cancer.

New Jack & Jill Course Update

We’re excited to officially confirm the new Jack & Jill Marathon & Half Marathon course.

Thank you for your patience and trust while we worked to secure the best possible course for runners to enjoy and crush their goals.

The updated course keeps the fast, PR-friendly experience Jack & Jill is known for — with fresh scenery and an improved race-day flow.

Course Highlights

• Point-to-point course

• Net downhill: ~1,100 feet

• Boston Qualifier eligible — no 5-minute downhill penalty

• Run through the iconic tunnel

• New scenic views including Lake Keecheles

Jack & Jill continues to be one of the fastest and most enjoyable marathon and half marathon experiences in the Pacific Northwest.

Race-Day Experience

• Professionally timed by Laurell (formerly Brooksee)

• Live tracking, mile splits, and printed finisher cards

• Abbott World Marathon Majors Age Group Ranking — Tokyo 2027

• Our Super Pacers leading you to your best time

Looking for a different date?

The Downhill Super Series now offers three weekends and three fast courses:

• Jack & Jill Marathon & Half — ~1,100’ net downhill

• Super Hyak Marathon & Half — 1247’ net downhill

• Cascade Express Marathon & Half — 1247’ net downhill

Choose the weekend that fits your race calendar best.

We can’t wait to welcome you to the new Jack & Jill course.

Visit the official race website for full race details, course maps, and race weekend information: Jack & Jill Marathon & Half

IMPORTANT FOR 2026: Damage to the Iron Horse trail from the December floods mean that no events are being held there in 2026, including the Iron Horse Half. Our course will be re-routed to adjust to this. Participants will be notified once our course adjustments are finalized. Thank you for your patience.

The Iron Horse Half Marathon will take place on August 30th, 2026 and is a half marathon starting at Olallie State Park and finishing in North Bend. It is a beautiful course that winds along the river and through the woods. PLUS IT'S 90% DOWNHILL!

Race Website

Check out our Bundle/Save

VIRTUAL RACE INFO - We have 40 spots for virtual runners. Once they sell out there are no more available. You can run the distance all at once or break it up into chunks and run it on the date of your choosing. You will receive a shirt and medal that will be mailed after the in person race.

Join us Labor Day weekend 2026 for an incredible sprint triathlon. Includes 1/4 mile swim in the crystal clear waters of Rattlensnake Lake with with fresh snow melt off the Cascades Mountains from the Cedar watershed. A mixed road/trail course (3 mile/7 mile) up the Palouse to Cascade Mountain bike trail (regular road bike is Okay) on this limestone/hard packed dirt trail. You top off your day with a 4 mile trail run on 3 mile of asphalt bike path and 1 mile of hard packed limestone/dirt path of the scenic Rattlesnake and Cascades Park. Don't miss this hidden gem of the Pacific Northwest. The event fills up fast and has a cap. Good Luck!

Event details and schedule

There is plenty of free parking at Rattlesnake Lake SPU (Seattle Public Utilities) lot. If you park at the Washington State Trail lot you will have to display a Discover Pass ($15/day or $45/yr) https://discoverpass.wa.gov/. Optional packet pick up Saturday Sept 5, 2026, 4- 5:30 pm at race site. Mandatory Safety briefing Thursday Sept 3, 2026, 5 pm. It is recorded so if you miss it you can watch the recording. Also will include rules and regulations for the USAT sanctioned race.