Races
Oakridge, Oregon. Waldo hundred k. Eight thousand five hundred feet. Waldo Lake country.
Field, 2026 · 24-year samplescraped
Geometryderived
Course records
The cruxOlympic National Forest climb to Waldo Lake (near mile 40)
Course DNA
Waldo runs 100 km through Oregon. +5,376 ft gain and -5,406 ft loss. Surfaces skew 85% trail / 15% forest road. Olympic National Forest climb to Waldo Lake. High point near 858 ft. Low near 669 ft. August temps run 45°F to 85°F. The course rewards patience early and punishes rushed descents after mile 31.
Train for 5,376 feet of climbing across 100 km. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 18 hours total means limited margin: rehearse fueling every 45 to 60 minutes and downhill eccentric work weekly. Technicality 5/10. Build a block that simulates the crux near mile 40.
August in Oregon: plan for 45°F to 85°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 18 hours pushes past dark. Poles help on sustained climbs above mile 16. Vest capacity for 2 liters minimum. Shoes matched to 85% trail: lugs for mud, rock plate if the course turns technical after mile 31.
Hold effort through mile 16. The field often splits on the first big climb after mile 31. Olympic National Forest climb to Waldo Lake near mile 40 is where time is won or lost. Walk the steep pinches. Run the flats and gentle downhills. Crew at major aids: socks, calories, ice if hot. Transitions under 5 minutes when possible. Final third is 21 miles of fatigue management. Finish with reserve for the last descent.
Results
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