Fall - Mud Mountain Dam Marathon & Half Marathon Logo

Fall - Mud Mountain Dam Marathon & Half Marathon

Enumclaw, WA

Sat, Sep 4, 2027

In 331 days · Sat, Sep 4, 2027

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When

Saturday, September 4th, 2027

Where

30525 S.E. Mud Mountain Rd., Enumclaw WA

Distances

Marathon · Half

Typical weather

On this date: rain 4 of the last 10 years

2025

49–68°F

dry

2024

45–60°F

dry

2023

44–57°F

dry

2022

49–67°F

dry

2021

45–53°F

rain

2020

51–60°F

rain

2019

43–57°F

dry

2018

42–58°F

dry

2017

41–48°F

rain

2016

43–55°F

rain

Best months to race in Washington →

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Race-day forecast · Saturday, Sep 4

Cloudy · 46–64°F

Saturday, Sep 4starts near 46°F · 0% chance of rain · wind up to 7 mph

About this race

Start Planning Now for Your Next Boston Qualifier!

Take on a beautiful, fully paved downhill course with no tunnel, no dirt, and no BQ downhill penalty.

Full Marathon
The Marathon starts at Mud Mountain Dam, high above the Carbon River at an elevation of approximately 1,400 feet.

From there, runners will follow a fully paved downhill route through picturesque farmland and forest, tracing the scenic Carbon River before finishing at the McMillin Farm Collective at approximately 128 feet.

That's a net elevation loss of about 1,200 feet—a fast, scenic course built for a memorable Boston Qualifier!

Half Marathon
The Half Marathon starts in the scenic town of South Prairie at approximately 467 feet and follows a gradual downhill route along the paved Foothills Rail Trail.

Runners will wind through farmland and forest alongside the Carbon River before finishing at the McMillin Farm Collective, at approximately 128 feet.

The course features a net elevation loss of 339 feet.

A Finish Line Worth Celebrating!
We've got a brand-new finish line just down the road from the McMillin Bridge, and we're making it a destination!

After crossing the finish line, stick around and celebrate with:

Brewhouse
Food trucks
Hot & Cold plunge pools

It's going to be a finish line to remember!

Beautiful course. Fast downhill miles. Fully paved. No tunnel. No dirt. No BQ penalty.

There’s no excuse not to do the dam thing!

Course map

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