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Best Boston Marathon Qualifiers for 2026

Best Boston Marathon Qualifiers

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best marathons to help you qualify for the Boston Marathon.

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Mud Mountain Dam (Spring) Marathon

Enumclaw, WA
Saturday, May 29, 2027


  5 Stars from 1 Reviews

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 feet), 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 fall on the same course.

May Other Marathons in May Other Marathons in Washington Marathons near Enumclaw, WA



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Race Information

Race Dates

2027: Saturday, May 29, 2027
2026: Saturday, May 30, 2026

Course Information

Profile: Downhill
Type: pt-2-pt
Surface: Road/Pavement

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

Race Day Weather

Mean Temp.: 61°F (16°C)
Average High: 67°F (19°C)
Average Low: 56° F (13°C)




PR Score & Course Score

PR Score: 102.46
Course Score: 102.46

Race Size

2026: 180 Finishers
2025: No Results
2024: No Results
2023: No Results
2022: No Results
2021: No Results

BQ Percentages

2026: 25%
2025: N/A
2024: N/A
2023: N/A
2022: N/A
2021: N/A

Miscellaneous Information

Pace Groups?: No

Weather Averages for Last 1 Years


Race Day Temperatures

High: 63°F  (17°C)
Low: 46°F  (8°C)

Race Start Conditions

55°F  (13°C)
Humidity: 67%

Partially cloudy
WSW 2 mph

PR Score

102.21

Course Score

102.46






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

Marathon rankings for the Mud Mountain Dam (Spring) Marathon will be listed for 2026 at the end of the year once finisher results are available.

The Mud Mountain Dam (Spring) Marathon has a Course Score of 102.46, ranking it as the 12th fastest marathon course in the U.S. and the 4th fastest marathon course in Washington.

Typical race-time temperature and humidity levels are within the ideal range for optimal marathon performance. Combined with the course profile, this gives the Mud Mountain Dam (Spring) Marathon a PR Score of 102.46. The PR Score ranks the Mud Mountain Dam (Spring) Marathon as the 10th best marathon in the U.S. for running a Personal Record (PR) and the 1st best marathon for a PR in Washington.

Together, these rankings provide a quick snapshot of how the Mud Mountain Dam (Spring) 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 (Spring) Marathon Marathon Rankings Summary
Course Speed12th fastest marathon course in the U.S.
Ranked 4th fastest marathon course in Washington
Top 3% Nationally#4 of 25 in Washington
PR Potential10th best marathon for a Personal Record in the U.S.
Ranked 1st best marathon for a PR in Washington
Top 3% Nationally#1 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




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

Use tools below to compare races and convert times across courses.

Do you want to see how the Mud Mountain Dam (Spring) Marathon stacks up against other marathons?

Compare the details of the Mud Mountain Dam (Spring) Marathon side-by-side with other marathons with our Comparison Tool.


Comparison Tool

If you ran the Mud Mountain Dam (Spring) Marathon in 3:47:00, what would your time in other marathons be?

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


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Race Reviews


5.0
Based on 1 reviews
Write Your Own Review

Great course

Full Review:

This course was awesome! It was either downhill or flat and the scenery was beautiful. There wasn’t a ton of crowd support, but I’m OK with that. I PR’d and Boston qualified on this course. I would definitely run it again.
Reviewed by GE About 2026