2026 edition
Entry options are not yet confirmed for this edition. Check the organiser before making plans.
Decision summary
32:01:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.
Historical race-date favourability, not a forecast
Stored GPS route
Quick answers
raceindex.org has a GPS course file for Oregon Cascades 100 Ultramarathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.
The Oregon Cascades 100 Ultramarathon is described as mountainous. The course listing puts the climb at 3,322 m.
The Oregon Cascades 100 Ultramarathon route starts at Pacific Crest Middle School, Bend, Oregon (100 mile); Swampy Lakes Sno Park (50 mile) and finishes at Sisters Middle School / Sisters School District track, Sisters, Oregon. Underfoot, expect 78% single-track trail, 20% gravel/dirt roads, 2% pavement (100 mile); 80% single track, 20% gravel road (50 mile). It passes Mount Bachelor, Swampy Lakes Sno Park, Bend, Sisters and Oregon Cascade Mountains. 100 mile course has 12 full aid stations.
Drop bags supported; deadline for drop bags is 8PM, with none accepted after that time. 12. Pacers are allowed (extra meal tickets available for purchase); crew access is permitted and runners with crew may be dropped off at the start line.