runfarwhere
Trail · 100 Mile

Mountain Lakes 100

· starts 6:00 AM
Olallie Lake, OR

WSER Qualifier
The race's site ↗Course map ↗

Mountain Lakes 100 is a trail race of 100 miles (161 km) in Olallie Lake, Oregon. The next edition is on Saturday, September 18, 2027, starting at 6:00 AM. The race gives its climbing as 11,700 ft (3,566 m); measured from its course file, it's 11,181 ft (3,408 m). It starts at 4,962 ft (1,512 m) above sea level. Its high point is 5,776 ft (1,760 m). The course finishes where it starts. It's a Western States 100 qualifier. Registration is open to all; registration opened on November 1, 2025. The field is about 200 runners.

There are 4 other upcoming 100-mile races in Oregon. Mountain Lakes 100 climbs about 117 ft a mile (22 m per km), flatter than 70% of the 143 100-mile races listed with their climbing.

101miDistance
11,700ftClimbing
200runnersField

The course

101miMeasured distance
14Aid stations
11,181ftMeasured climb
11,181ftDescent
5,776ftHigh point
3,236ftLow point

Questions about Mountain Lakes 100

When is Mountain Lakes 100 2027?

Mountain Lakes 100 2027 is on Saturday, September 18, 2027, starting at 6:00 AM local time.

Where is Mountain Lakes 100?

Mountain Lakes 100 is held in Olallie Lake, Oregon.

How long is Mountain Lakes 100?

Mountain Lakes 100 is 100 miles (161 km); its course file measures 101 miles.

How much elevation gain does Mountain Lakes 100 have?

Mountain Lakes 100 has 11,700 ft (3,566 m) of elevation gain, as the race states it.

Is Mountain Lakes 100 a Western States qualifier?

Yes. Mountain Lakes 100 is on the Western States 100's list of qualifying races. Check wser.org for the qualifying standard and years.

How do you get into Mountain Lakes 100?

Mountain Lakes 100 has open registration. Registration opened on November 1, 2025.

How many aid stations does Mountain Lakes 100 have?

Mountain Lakes 100's course has 14 aid stations after the start.

Where can I see the Mountain Lakes 100 elevation profile and aid station cutoffs?

runfarwhere has Mountain Lakes 100's course file. The outline, distance and climbing are free on its page; the elevation profile, aid stations with cutoffs and the GPX file are part of runfarwhere Premium.

How hilly is Mountain Lakes 100?

Mountain Lakes 100 climbs about 117 ft a mile (22 m per km), flatter than 70% of the 143 100-mile races listed with their climbing.

What other 100-mile races are there in Oregon?

Other upcoming 100-mile races in Oregon include Crown Stub 100 (April 24, 2027), Brink 100 mile trail run (July 1, 2027) and Hood Hundred (July 2, 2027).

Other races in Oregon

Every race in Oregon

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