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MULTIDAYRUNNING
🏁 Fixed-Distance

Mountain Lakes 100

A remote 100-mile Cascade trail race based at Olallie Lake, with rocky mountain terrain, Pacific Crest Trail miles, 11,700 ft of gain, and a 30-hour cutoff.

Official WebsiteOfficial ResultsBack to Events

Event dates, entry rules, qualification standards, and course details can change. Always verify current information on the official event website before registering or booking travel.

Event Overview

Listed edition overview
DateSep 19-20, 2026
Location🇺🇸 Olallie Lake Resort, Oregon, USA
FormatFixed-Distance
TerrainMountain
RegionNorth America
Distance100 mi
State / areaOregon (OR)
Course modelLoop
Edition noteWaitlist at the August 10 directory review.
Elevation gain11,700 ft
Elevation loss11,700 ft
Cutoff30 hours
HighlightsPacific Crest Trail, Olallie Lake

Course & Terrain

Mountain loop through the Olallie Lake area and nearby Pacific Crest Trail terrain between Mount Jefferson and Mount Hood.

Key course features to know before comparing this race:

  • Olallie Lake Resort race base
  • Rocky Cascade and Pacific Crest Trail sections

The course combines runnable forest trail with rocky mountain footing and enough cumulative climbing to make late-race pace variable.

Entry & Logistics

Listed qualification and support details
Registration and feesCheck the official event website for current availability, deadlines, prices, taxes, and refund terms.
Logistics noteThe organizer listed the 2026 race as waitlisted at verification. Confirm entry status, remote access, crew rules, course updates, and the current runner manual.

Why This Race Matters

Mountain Lakes 100 is a useful reference point for runners comparing long fixed-distance ultras that still unfold over multiple days. Its format, terrain, and support model shape the kind of preparation required: not just fitness, but pacing discipline, nutrition planning, foot care, and the ability to make good decisions under fatigue.

Planning Notes

  • Prepare for sleep decisions, weather swings, and aid-station discipline. The distance is only one part of a multi-day fixed-distance race.
  • Treat intermediate cutoff gates as part of the course. Build enough margin for aid stops and late-race slowdown, and verify every current gate in the official rules.
  • Train for terrain-specific fatigue. Technical trails and mountain courses demand downhill durability, hiking efficiency, and reliable night lighting.
  • The directory does not mark this as having simpler logistics. Confirm qualification, terrain, support, registration, medical, and withdrawal requirements before planning around it.
  • Remote race venue and mountain access
  • Waitlist status can change; verify before planning travel

Event FAQs

What is the Mountain Lakes 100 cutoff?

The official race page lists a 30-hour cutoff.

Where is Mountain Lakes 100 based?

The event is based at Olallie Lake Resort in Oregon's Cascade mountain region.

Verification & Sources

Verification scope: the listed edition's date, location, format, and available logistics were checked against the event-specific official sources below during the directory review dated August 10, 2026. Organizers can revise details after review.

  1. Official Mountain Lakes 100 page — https://gobeyondracing.com/races/mountain-lakes-100/
  2. Official course and crewing information — https://gobeyondracing.com/races/mountain-lakes-100/course-crewing-2/
  3. Official results — https://gobeyondracing.com/races/mountain-lakes-100/results/
  4. Multiday Running event directory review scope: August 10, 2026.