Mountain Lakes 100 — 2026 — Course Map, Elevation Profile & Aid Stations

Course map, elevation profile & surface

Distance

97.7mi

Elev gain

9,601ft

Elev loss

9,593ft

High point

5,784ft

Low point

3,222ft

Effective oxygen

81–89%of sea level

Surface

96% trail

Drawing the course…

The course file didn’t load.Usually a hiccup. The stats above are still right.

Race-day light

In the dark

37%

Sunrise

6:51am

Sunset

7:12pm

Headlamp from

62mi

For a 20:15 finish (an estimate) · starting 7:00 AM Sep 19 · headlamp mi 62–the finish. Dark means the sun below civil twilight.

Climbs

12 climbs · 7,947 ft totalbiggest first

Pick a climb to find it on the profile and the map.

Elevation gain, measured two ways

Source	Gain	vs lidar
Course file (GPX)	9,601ft	-10%
USGS lidar, 1 m	10,663ft	reference

They differ because a GPS file picks up noise on every wiggle and often takes its heights from a coarse terrain model, while lidar maps the ground itself to about a metre. We sampled this route every 98 ft against USGS 3DEP and counted each rise of 10 ft or more, on Oct 23, 2026. The planner still uses the course file.

Aid stations as published on the course file

Aid station	Mile	km
Start/Finish	0.0	0.0
Olallie AS	0.0	0.0
A Pinheads AS	23.2	37.4
A Warm Springs AS	28.7	46.1
A Red Wolf AS	34.1	54.9
A Little Crater Lake AS	45.0	72.5
A Frog Lake AS	52.7	84.8
A Dam AS	65.6	105.6
A Clackamas Ranger AS	69.5	111.8
A Olallie Meadows AS	94.0	151.2

Badge colours match the markers on the map above — always confirm locations and cutoffs with the race organizer.

Race director? Check this course and correct anything that’s off, and it carries a ✓ verified by the race badge everywhere it appears, including the free map embed for your own site. Claim your course.

Nobody from Mountain Lakes 100 — 2026 has checked this course yet — it’s built from what the race published. Ask them to:Email your race director

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Conditions typical race-day weather for Sep 19 at the start

Typical high

57°F

Typical low

40°F

Chance of rain

36%

2025 high

75°F

Typical = the median of 2016–2025 for Sep 19 ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.

Race almanac 1 year of this race

Past editions

On race day it reached 69°F at the start, with a low of 47°.

Year	Start °F	Rain	Wind
2026 Sep 19	69°/47°	dry	4mph

Next race day Sat, Sep 18, 2027 · 7:00 AM start

First lightsunrise 6:50 am

6:21am

Last lightsunset 7:15 pm

7:44pm

Moonwaning gibbous, up from 7:59 pm

89% lit

First and last light are civil twilight, the sun 6° below the horizon. The moon is lit as at midnight after the start; headlamp hours count a typical finish from the start while the sun is below civil twilight. Worked out for the start line.

race-day weather from the Open-Meteo historical archive (ERA5) at the start line.

Reviews what runners who have been there say

No reviews yet — be the first to run it and tell other runners what to expect.

About this course

Mountain Lakes 100 — 2026 covers 97.7 mi (157.2 km) with 9,601 ft of elevation gain through Oregon, United States. That is about 98 ft per mile of climbing, and 9,593 ft of descent. The course tops out at 5,784 ft and bottoms out at 3,222 ft. The surface is 96% trail and 4% gravel. There are 8 aid stations on course; the longest stretch between aid is 24.5 mi. The profile has 12 sustained climbs; the biggest is the climb from mi 78.4, +1,739 ft over 5.3 mi at 6.2% on average (steepest stretch 14%). Race day is September 19, 2026, starting at 7:00 AM; the sun rises at 6:51 AM and sets at 7:12 PM. Typical race-day weather at the start: a high of 57°F and a low of 40°F, with a 36% chance of a wet day. The interactive map above shows the full route with its elevation profile and aid stations, built from the course's GPS file.

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