Sat, Sep 4, 2027

Fall - Mud Mountain Dam Marathon & Half Marathon

Enumclaw, WA

Registration openAnnual since at least 2021
MarathonHalf Marathon

Entry is $105 now and rises to $115 after Jan 1, 2027, so registering before then saves $10.

Register Results

About the Fall - Mud Mountain Dam Marathon & Half Marathon

The marathon starts at Mud Mountain Dam and drops steadily toward the finish near the McMillin Bridge, tracing the Carbon River through farmland and forest the whole way. Everything is paved, the descent is long and consistent, and the course qualifies for Boston because of how much elevation it sheds. The half follows the Foothills Rail Trail from South Prairie, a gentler version of the same idea.

The two courses share a finish line in front of the McMillin Bridge, so friends and family waiting there will see both waves come through.

Free race emails

Get the Weekly RunSesh

Get races near Enumclaw in your inbox. Every Monday we send the races coming up, and every Thursday we send the ones happening that weekend.

Two helpful emails per week. No spam. Unsubscribe anytime.

Fall - Mud Mountain Dam Marathon & Half Marathon 2026 Results

Going by the 2026 results, this is a small, friendly field, with a competitive front end and a big recreational middle.

Half Marathon Results · 2026

239finishers
1:18:02winner
2:16:28median
4:06:54cutoff

Top 3: James Roach (1:18:02) · Garrett Ianacone (1:23:47) · Katia Hensley (1:28:21)

Dam Half Marathon Results · 2025

185finishers
1:10:31winner
2:08:00median
4:36:19cutoff

Top 3: Liam Monaghan (1:10:31) · Zachary Katzman (1:13:34) · Aman Luthra (1:24:23)

Marathon Results · 2026

174finishers
2:42:18winner
4:12:28median
6:29:10cutoff

Top 3: Mark Albanese (2:42:18) · Davin Soto (2:49:48) · Amy Hoagland (2:51:21)

Dam 5K Results · 2025

127finishers
18:08winner
36:10median
1:09:10cutoff

Top 3: Perry Sweet (18:08) · Steven Minters (20:06) · Chan Phoung (20:32)

The Fall - Mud Mountain Dam Marathon & Half Marathon has been held every year since at least 2021. That is as far back as RunSignup's records for this race go, so it may well be older.

Where Would You Finish?

Enter a finish time to see where it lands against the most recent 13.1 Miles results.

Median

See how your time stacks up nationally →

How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Nov 12, 2026.

Distances & Start Times

26.2 Miles9/4/2027 07:00$115
13.1 Miles9/4/2027 08:15$105

Going for a Time?

Set a goal and get a pace band: every mile split on a card sized for your phone lock screen, so race morning needs no math.

Not sure what to aim for? The marathon pace chart lists the pace for every finish time.

Plan Your Trip

Where to Stay

Traveling for this race? The map shows hotels and rentals in and around Enumclaw — pan or zoom to compare what's nearby.

The map is provided by Stay22. If you book through it, RunSesh may earn a commission at no extra cost to you — it never affects the races we list.

Common Questions About the Fall - Mud Mountain Dam Marathon & Half Marathon

Will I finish last at the Fall - Mud Mountain Dam Marathon & Half Marathon?

Almost certainly not. Half the 13.1 Miles field finished slower than 2:16:28, and the last recorded finisher came in around 4:06:54, so there is a long tail of runners behind the middle of the pack. Most fields are far slower than people expect.

Is the Fall - Mud Mountain Dam Marathon & Half Marathon a good first 13.1 Miles?

A field of 239 is big enough that you will have company at your pace without feeling lost in a crowd. There is no qualifying time, and the finish-time spread above shows how varied the field really is. If it is your first 13.1 Miles, that spread matters more than the winner's time.

How competitive is the Fall - Mud Mountain Dam Marathon & Half Marathon?

The 13.1 Miles winner ran 1:18:02 while the median finisher took 2:16:28. That spread points to a mixed field, with a competitive front and a big recreational middle.

Share Your Card

We made you a ready-to-post image. Story fits Instagram and TikTok Stories; Post fits the feed. Download it, post it, and tag @runsesh so we can cheer you on.

Preview of your share card

Want more races like this delivered straight to your inbox?

Free race emails

Get the Weekly RunSesh

Get races near Enumclaw in your inbox. Every Monday we send the races coming up, and every Thursday we send the ones happening that weekend.

Two helpful emails per week. No spam. Unsubscribe anytime.