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Mud Mountain Dam (Fall) Marathon

Enumclaw, WA
Saturday, September 19, 2026


No reviews yet


Course Description
The marathon course begins at Mud Mountain Dam (elevation ~1,350 feet). Runners will follow a fully paved route through picturesque farmlands and forested areas, tracing the path of the Carbon River. The race finishes in front of the historic McMillin Bridge (elevation ~150'), with a total net elevation loss of approximately 1,200 feet.

The course starts with a relatively steep descent. It drops approximately 530 feet in the first 2.25 miles.

There is a sister marathon in the spring on the same course.





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Race Information

Race Dates

2026: Saturday, September 19, 2026
2025: TBD

Course Information

Profile: Downhill
Type: Point to Point
Surface: Road/Pavement

Boston Qualifier?: Yes
World Marathon Major Qualifier?: No


Race Day Weather

Mean Temp.: 59°F (15°C)
Average High: 71°F (21°C)
Average Low: 47° F (8°C)





PR Score & Course Score

PR Score: 102.30
Course Score: 102.46


Race Size

2025: No Results
2024: No Results
2023: No Results
2022: 58 Finishers
2021: 55 Finishers
2020: No Results

BQ Percentages

2025: N/A
2024: N/A
2023: N/A
2022: 6.9%
2021: 16.4%
2020: N/A

Miscellaneous Information

Pace Groups?: No

Weather Averages for Last 0 Years


Race Day Temperatures

High: 0°F  (°C)
Low: 0°F  (°C)

Race Start Conditions

0°F  (°C)
Humidity: 0%


 0 mph

PR Score

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Course Score

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Mud Mountain Dam (Fall) Marathon Rankings, Course Speed & Boston Qualifier Statistics

Marathon rankings for the Mud Mountain Dam (Fall) Marathon will be listed once results for this inaugural marathon have been posted.

The Mud Mountain Dam (Fall) Marathon has a Course Score of 102.46, ranking it as the 13th fastest marathon course in the U.S. and the 3rd fastest marathon course in Washington.

Typical race-time temperature and humidity levels are slightly above the ideal range for optimal marathon performance. Combined with the course profile, this gives the Mud Mountain Dam (Fall) Marathon a PR Score of 102.30. The PR Score ranks the Mud Mountain Dam (Fall) Marathon as the 12th best marathon in the U.S. for running a Personal Record (PR) and the 2nd best marathon for a PR in Washington.

Together, these rankings provide a quick snapshot of how the Mud Mountain Dam (Fall) Marathon compares with other marathons in the U.S. and Washington for speed, PR potential, Boston Marathon qualifying success, and overall participation.

Mud Mountain Dam (Fall) Marathon Marathon Rankings Summary
Course Speed13th fastest marathon course in the U.S.
Ranked 3rd fastest marathon course in Washington
Top 3% Nationally#3 of 25 in Washington
PR Potential12th best marathon for a Personal Record in the U.S.
Ranked 2nd best marathon for a PR in Washington
Top 3% Nationally#2 of 25 in Washington

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




Elevation Chart


Max Elevation: 1335 feet (407m)
Min Elevation: 134 feet (40m)

Elevation Gain: 180 feet (54m)
Elevation Loss: 1515 feet (461m)


Mud

Course updated 01/04/2026





Hotel & VRBO Accommodations for the Mud Mountain Dam (Fall) Marathon

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Compare the Mud Mountain Dam (Fall) Marathon to other Marathons

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If you ran the Mud Mountain Dam (Fall) Marathon in 4:16:00, what would your time in other marathons be?

See how your finish time would compare on other marathon courses with our Time Conversion Tool.




Race Reviews


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