Timberline Marathon – Negative Split

The remaining 2026 race season 👀

The remaining 2026 race season 👀

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Who is Negative Split?
We’re a team of fitness junkies working our butts off to make sure you have a killer experience on event day.

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What We Do
We organize unforgettable races and events throughout the Pacific Northwest. Year over year, we have shown increases in participation and revenue.

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Check out what’s happening in the running & fitness community throughout the Pacific Northwest.

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For Race Planners
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Chip Timing Services
Our services deliver accurate results and live updates to keep runners and spectators connected every step of the way.

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Race & Event Production
We provide anywhere from complete start-to-finish organization to managing just the smaller details for your events.

shop
Equipment Rentals
We have a full warehouse of equipment ready to meet all of your event needs.

Learn More
Learn More
Learn More

About Us
shop
Who is Negative Split?
We’re a team of fitness junkies working our butts off to make sure you have a killer experience on event day.

shop
What We Do
We organize unforgettable races and events throughout the Pacific Northwest. Year over year, we have shown increases in participation and revenue.

shop
NEGATIVE SPLIT NEWS FEED
Check out what’s happening in the running & fitness community throughout the Pacific Northwest.

Meet the team
What We Do
News Feed
News Feed
Get Involved
For Race Planners
shop
Chip Timing Services
Our services deliver accurate results and live updates to keep runners and spectators connected every step of the way.

shop
Race & Event Production
We provide anywhere from complete start-to-finish organization to managing just the smaller details for your events.

shop
Equipment Rentals
We have a full warehouse of equipment ready to meet all of your event needs.

Learn More
Learn More
Learn More

About Us
shop
Who is Negative Split?
We’re a team of fitness junkies working our butts off to make sure you have a killer experience on event day.

shop
What We Do
We organize unforgettable races and events throughout the Pacific Northwest. Year over year, we have shown increases in participation and revenue.

shop
NEGATIVE SPLIT NEWS FEED
Check out what’s happening in the running & fitness community throughout the Pacific Northwest.

Meet the team
What We Do
News Feed
News Feed
Get Involved
For Race Planners
shop
Chip Timing Services
Our services deliver accurate results and live updates to keep runners and spectators connected every step of the way.

shop
Race & Event Production
We provide anywhere from complete start-to-finish organization to managing just the smaller details for your events.

shop
Equipment Rentals
We have a full warehouse of equipment ready to meet all of your event needs.

Learn More
Learn More
Learn More

Timberline MarathonnsplitWP2026-10-15T11:00:50-07:00

eventsq-timberline

timberline_banner27m

JUNE 5-6, 2027

JUNE 5-6, 2027

MARATHON • HALF MARATHON

MARATHON • HALF MARATHON

MARATHON • HALF MARATHON

RACE DETAILS

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LOCATION

Timothy Lake, OR

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RACE TYPE

TRAIL

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ATHLETE GUIDE

Check out the official Athlete Guide for all the important race details, such as packet pickup location and times, race schedule, race village location, and more runner information.

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COURSE DETAILS

Escape to the Oregon Cascades for an unforgettable trail running adventure! Traverse scenic single-track trails, rustic bridge crossings, and the shores of Timothy Lake, all with breathtaking views of majestic Mt. Hood along the way.

COUNTDOWN TO RACE DAY

WHY I RUN THE TIMBERLINE MARATHON

“I love this race. Lost track of how many times I’ve ran the marathon. But it was another great day out there. Thanks!!!”

TIMBERLINE MARATHON PARTICIPANT

“That was so much fun!”

TIMBERLINE MARATHON PARTICIPANT

OFFICIAL RACE CHARITY PARTNER

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GO THE DISTANCE

Go The Distance (GTD) is a 501(c)(3) nonprofit organization that, through partnerships with local rehabilitation centers, advocates for sobriety through fitness and unity. We promote recovery through fitness, community, and compassion.

MORE INFO

RACE SPONSORS

Check out the incredible sponsors who make this race possible with their generous support and help make the event possible for our running community.

VOLUNTEER

Find volunteer opportunities such as packet pickup, race check-in, course monitor, and more.

Sign Up to Volunteer

RESULTS & PHOTOS

Search for your live or virtual race results, view past winners, and view your race photos.

Find My Results

This institution operates under a special use permit with the Mt. Hood National Forest, USDA, USFS.

Have a Question About The Timberline Marathon?