The Waldo 100K Ultramarathon is a premier endurance event held in the beautiful Oregon Cascades. Starting at the Willamette Pass Ski Area, this challenging 100K loop course takes runners through some of the most scenic and rugged terrain in the region. Designed for experienced ultramarathoners, the race begins in the early morning darkness, testing both physical stamina and mental fortitude. Join a community of dedicated athletes for this iconic Oregon trail running experience.
What to Expect
A grueling and rewarding ultramarathon through high-elevation mountain trails.
Who Should Attend
- Ultramarathon runners
- Endurance athletes
- Trail running enthusiasts
Agenda Overview
The race starts at 4:00 AM on August 1, 2026.
Venue & Address
Organizer
Waldo 100K · Sports Organization
Organizers of the annual Waldo 100K ultramarathon.
Frequently Asked Questions
Where is the race?
Willamette Pass Ski Area, Oregon.
What is the distance?
100 kilometers.
What time does it start?
4:00 AM.
Is it a loop course?
Yes, it is a loop-type course.
How do I register?
Registration is available via UltraSignup.
Is it for beginners?
This is a challenging ultramarathon intended for experienced runners.
Tags
Sports
Running
Ultramarathon
Oregon
Crescent
Endurance
Summary
Challenging 100K ultramarathon in the Oregon Cascades.
Highlights
- 100K loop course
- Challenging terrain
- Oregon Cascade scenery
- Early morning start
- Endurance test
- Willamette Pass Ski Area venue
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