Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 2:35 finish (an estimate) · starting 7:00 AM Sep 19. Dark means the sun below civil twilight.
Climbs
biggest firstElevation gain, measured two ways
| Source | Gain | vs lidar |
|---|---|---|
| Course file (GPX) | 964ft | +205% |
| USGS lidar, 1 m | 316ft | 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 | 0.0 | 0.0 |
| A AS1 | 7.1 | 11.5 |
| CHECK-IN/FINISH/SHUTTLE | 12.6 | 20.2 |
Badge colours match the markers on the map above — always confirm locations and cutoffs with the race organizer.
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Conditions typical race-day weather for Sep 19 at the start
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 71°F at the start, with a low of 44°.
| Year | Start °F | Rain | Wind |
|---|---|---|---|
| 2026 Sep 19 | 71°/44° | dry | 7mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line.
Reviews what runners who have been there say
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About this course
Three Sisters Skyline 1/2 Marathon — 2026 covers 12.6 mi (20.2 km) with 964 ft of elevation gain through Oregon, United States. That is about 77 ft per mile of climbing, and 1,961 ft of descent. The course tops out at 4,285 ft and bottoms out at 3,199 ft. The surface is 87% trail, 10% gravel and 3% paved. There is 1 aid station on course; the longest stretch between aid is 7.1 mi. Race day is September 19, 2026, starting at 7:00 AM; the sun rises at 6:51 AM and sets at 7:11 PM. Typical race-day weather at the start: a high of 63°F and a low of 43°F, with a 21% 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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Course history
- Sep 3, 2026Added to the catalog
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