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Looking for the Best Boston Marathon Qualifying Races?

View our list of marathons that give you the best chance to BQ.

Race Dates

2018: Saturday, September 29, 2018
2017: Saturday, September 30, 2017

Course Information

Profile: Downhill
Type: Point to Point
Surface: Trail
Certified?: Yes

Race Day Weather

Mean Temp.: 57°F (13°C)
Average High: 65°F (18°C)
Average Low: 49° F (9°C)

Historical Weather

PR Score & Course Score

PR Score: 100.79
Course Score: 101.51

Race Size

2017: 162 Finishers
2016: No Results
2015: No Results

BQ Percentages

2018: N/A
2017: 14.8%
2016: N/A

Miscellaneous Information

Pace Groups?: Yes

Marathon Pace Bands & Elevation Wrist Bands

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Course Description

The Cascade Express Marathon course is one of the fastest in the country. The low starting elevation of 2,550' and gentle decent makes the courses great for fast times. It is the perfect race to set a PR, snag a BQ and have a great time. Don't let "trail" in the description deter you. The courses are smooth and runnable much like road events. You can expect fast feet with 1,500' of total elevation loss at a consistent grade.

The Cascade Express Marathon course starts at Snoqualmie Pass, makes a 5 mile out and back on the Iron Horse trail before entering the 2.4 mile Snoqualmie Tunnel. The first 7.5 miles of the course are relatively flat with minimal elevation gain or loss. The course becomes downhill after running through the tunnel to the finish at Rattlesnake Lake Park.

The Super Marathon is run on the same course in June.

Marathon Rankings

The Cascade Express Marathon (Cascade Super Series) was the 299th largest marathon in the U.S. last year.

Its Course Score of 101.51 ranks it as the 20th fastest marathon course in the U.S. and the 9th fastest course in Washington.

The typical race time temperature and humidity levels are slightly above the ideal range for optimal marathon performance. This, coupled with the Course Score, gives the Cascade Express Marathon (Cascade Super Series) a PR Score of 100.79. This PR Score ranks it as the 22nd fastest marathon in the U.S. and the 9th fastest in Washington.

Learn more about PR Scores and Course Scores on the FAQ page.

Elevation Chart

Max Elevation: 2578 feet (785m)
Min Elevation: 968 feet (295m)


Ratings & Reviews: None

Finish Time Equivalent

If you ran the Cascade Express Marathon (Cascade Super Series) in 4:38:00, what would your time in the Boston Marathon be?

See how your race times would compare on other marathon courses using the Marathon Time Converter Tool.