Waldo 50K is a 50km ultra marathon in Oakridge, United States. Distance: 50km. Elevation: 2,100m D+. Difficulty: moderate (Challenge Rating 35/100). DNF rate: 8%. Time limit: 10h. Surface: trail. Established 2003.
Waldo 50K
Oakridge, Oregon, United States
"50K around one of the purest lakes in the world through Oregon's volcanic Cascades."
A scenic 50K loop around Waldo Lake in the Oregon Cascades — pristine waters, volcanic terrain, and Pacific Crest Trail running.
The Course
A scenic loop through the Oregon Cascades around Waldo Lake, one of the purest bodies of water in the world. The course traverses volcanic terrain, old-growth forests, and high alpine meadows. Pacific Crest Trail sections offer quintessential Oregon mountain running.
hilly
loop
5
2,200m
Runner Experience
Standard aid station support with food, drinks, and basic medical assistance at regular intervals.
Warm, inclusive finish line with a strong community feel. Runners celebrate together regardless of finish time.
Race Day Weather
18°C
8° – 28°
30%
10%
Oregon Cascades summer. Warm, dry days. Cool mornings. Wildfire smoke can be an issue in August.
Stats & Records
2003
300
6:30:00
3:32:22
Max King (2019)
4:12:45
Yiou Wang (2022)
Entry
$85
February
instant
Lore & Trivia
Waldo has become one of Oregon's most beloved trail races, celebrating the pure beauty of the Cascades and the crystal-clear waters of Waldo Lake.
- ▸ Waldo Lake has the clearest water of any lake in Oregon — visibility extends to 30m.
- ▸ The Pacific Crest Trail section gives runners a taste of one of America's great thru-hikes.
- ▸ The volcanic terrain of the Oregon Cascades creates unique pumice-covered trails.
- ▸ Despite 'only' being a 50K, it sells out within minutes due to its stunning setting.
- ▸ Established in 2003.
The 50K around Waldo Lake — pristine water, Douglas fir forest, and the Oregon Cascades. A perfect introduction to Northwest trail running.
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Frequently Asked Questions
How long is Waldo 50K? +
Waldo 50K is a 50km (50km) ultra marathon with 2,100m of elevation gain. The course is loop on trail terrain.
How hard is Waldo 50K? +
Waldo 50K is rated moderate with a Challenge Rating of 35/100 (Moderate). The DNF rate is 8%. Runners have 10 hours to finish.
How do I enter Waldo 50K? +
Entry is by lottery. Entry costs $85. with a maximum of 350 starters.
What is the weather like at Waldo 50K? +
Average temperature is 18°C (range 8°C to 28°C) with 30% humidity and a 10% chance of rain. Oregon Cascades summer. Warm, dry days. Cool mornings. Wildfire smoke can be an issue in August.
Are crew and pacers allowed at Waldo 50K? +
No crew access is permitted. Pacers are not allowed.
What is the course record for Waldo 50K? +
The men's course record is 3:32:22 set by Max King in 2019. The women's course record is 4:12:45 set by Yiou Wang in 2022.
What is the average finish time for Waldo 50K? +
The average finish time is 6:30:00. About 300 runners finish each year. The DNF rate is 8%.
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