Fall - Mud Mountain Dam Marathon & Half Marathon
Fall - Mud Mountain Dam Marathon & Half Marathon is a running race on September 19, 2026 in Enumclaw, WA, with entry fees from $90 to $100.
- Date
- September 19, 2026 (58 days to go)
- Price
- $90–$100
- Sport
- Running
From the Organizer
September 19, 2026 – The Full Marathon Returns!
We’re excited to announce that the Full Marathon is coming back in 2026, and will also be part of our. Start planning now for your next Boston Qualifier on this beautiful, fully paved downhill course, no tunnel, no dirt, no BQ time penalty!
There’s no excuse not to do the dam thing!
Marathon
The marathon course begins at Mud Mountain Dam (elevation 1,400′). 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 200′), with a total net elevation loss of approximately 1,200′.
Half Marathon
The Half Marathon begins in the scenic town of South Prairie (elevation 467′) and follows a gradual downhill route along the paved Foothills Rail Trail. Runners will enjoy a picturesque journey through farmland and forest, winding alongside the Carbon River and finishing in front of the historic McMillin Bridge (elevation 128′). The course features a net elevation loss of 339 feet.
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
71°
Typical Low
47°
Chance of Rain
32%
Based on US Climate Normals data from Buckley 1 Ne, 7 mi from the venue.
Host City
About Enumclaw, WA
City Elevation
558 ft
Nearest Airport
SEA
Seattle–Tacoma International Airport · 18 mi
Time Zone
Pacific Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at Fall - Mud Mountain Dam Marathon & Half Marathon, put it on the calendar, and turn “someday” into a start date.
58
Days to train
- Race
- Fall - Mud Mountain Dam Marathon & Half Marathon
- Date
- September 19, 2026
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From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
More Running races near Enumclaw, WA
The Wacky Dash 5K
5K · From $30 · 22500 SE 248TH ST
8 miles away
Run for the Gnomes Half Marathon & 5K
10K · Half Marathon · From $36 · 22500 SE 248th Street
8 miles away
Baby Steps 5K 2026
5K · From $25 · Roegner Park
3 miles away
Ten Trails Active Club Trot n' Treat Relay Scramble
23089 SE Fir St
3 miles away
Plan your trip
Make it a Racecation
Coming from out of town? There's more to Enumclaw than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.
Plan your trip to EnumclawFrequently Asked Questions (FAQs)
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Fall - Mud Mountain Dam Marathon & Half Marathon
Sep 19, 2026