2027 Centennial 100
2027 Centennial 100 is a running race on June 19, 2027 in Snohomish, WA, with entry fees from $100 to $360.
- Date
- June 19, 2027 (295 days to go)
- Location
- 802 1st Street, Snohomish, WA
- Price
- $100–$360
- Sport
- Running
From the Organizer
The Centennial Relay & Ultra Run isn’t just another race. It’s an unforgettable 100K adventure through the heart of the Pacific Northwest!
Covering 100KM (62 miles) along the Centennial Trail, this epic journey starts at Space 802 in Historic Downtown Snohomish, takes runners all the way north to the Nakashima Barn in Arlington, and back to Snohomish for the finish.
Take on the entire 100K solo or build your crew and share the miles with a team of 2, 4, or 6 runners. Whether you're an ultra runner ready to tackle all 62 miles or looking for an unforgettable relay experience with friends, there’s a way to take on the Centennial.
Expect a full day of running, team support, relay exchanges, beautiful Pacific Northwest scenery, and plenty of opportunities to cheer each other on along the way.
Collect the Cowbells 🔔
There are 6 legs to conquer and 7 cowbells to collect!
At the end of each leg, the runner who completed that leg will receive a Centennial cowbell to celebrate the miles they just conquered. Keep collecting them throughout the day as your team makes its way up the Centennial Trail and back.
Your 7th and final cowbell will be waiting at Space 802, where you’ll complete the 100K journey and celebrate at the finish!
For relay teams, the cowbell belongs to the runner who completed that leg, so divide up the miles, collect your cowbells, and see your team’s 100K adventure come together one leg at a time.
Event Details
Distance: 100KM / 62 Miles
Date: Saturday, June 19, 2027
Start & Finish: Space 802, Historic Downtown Snohomish
Course: Centennial Trail to Nakashima Barn in Arlington and back
Race Options:
100K Solo
2-Person Relay
4-Person Relay
6-Person Relay
One trail. 100 kilometers. 7 cowbells. Your challenge, your way.
Grab your crew or take it on solo and get ready for an unforgettable day on the Centennial Trail!
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
68°
Typical Low
49°
Chance of Rain
40%
Based on US Climate Normals data from Monroe, 6 mi from the venue.
Host City
About Snohomish, WA
City Elevation
18 ft
Nearest Airport
PAE
Seattle Paine Field International Airport · 10 mi
Major Hub
SEA
Seattle–Tacoma International Airport · 32 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 2027 Centennial 100, put it on the calendar, and turn “someday” into a start date.
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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
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Frequently Asked Questions
What is the 2027 Centennial 100?
When and where is the 2027 Centennial 100?
How do I register for the 2027 Centennial 100?
2027 Centennial 100
Jun 19, 2027