Fall - Mud Mountain Dam Marathon & Half Marathon
- Date
- September 19, 2026
- Distance
- Fall - Dam Marathon · Fall - Dam Half Marathon
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
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.
103
Days to train
- Race
- Fall - Mud Mountain Dam Marathon & Half Marathon
- Date
- September 19, 2026
Coming Up
More Running races near Enumclaw, WA
Ten Trails Active Club 5k Summer Series
5K
3 miles away
Maple Valley Bear Run & Walk 5K
5K
8 miles away
Mud Mountain Trail Fest
Less than a mile away
Paul Ruston Memorial Run
8 miles away
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.
The half marathon is the distance where you find out what you're actually made of. Long enough to demand real preparation. Short enough that it doesn't consume your life to train for it. Most people who run their first half describe it as the race that changed their relationship with what they're capable of. Once you cross this finish line, the bar moves. That's not a warning — that's the point.
Race day energy varies by event size, but the finish line feeling is the same regardless. Big races keep the noise going the whole way. Smaller races give you stretches where it's just you and the miles — and that solitude becomes its own kind of fuel.
The half marathon rewards people who show up for the boring training miles.
How long to train: 10–14 weeks. If you're already running consistently, 10 weeks of structured buildup is enough. If you're building from a casual base, give yourself 14.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the Fall - Mud Mountain Dam Marathon & Half Marathon?
- Fall - Mud Mountain Dam Marathon & Half Marathon is a running race held in Enumclaw, Washington on September 19, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the Fall - Mud Mountain Dam Marathon & Half Marathon?
- Saturday, September 19, 2026 in Enumclaw, Washington at 30525 S.E. Mud Mountain Rd., Enumclaw, WA. Check the event page for exact start times and wave schedules.
- How do I register for the Fall - Mud Mountain Dam Marathon & Half Marathon?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
Fall - Mud Mountain Dam Marathon & Half Marathon
Sep 19, 2026