Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 10:45 finish (an estimate) · starting 7:00 AM May 1. Dark means the sun below civil twilight.
Climbs
10 climbs · 5,181 ft totalbiggest firstConditions typical race-day weather for May 1 at the start
Typical = the median of 2016–2025 for May 1 ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac the sky on race day
Next race day Sat, May 1, 2027 · 7:00 AM start
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.
Reviews what runners who have been there say
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About this course
Sea to Sky 100K — 2027 covers 48.9 mi (78.7 km) with 7,054 ft of elevation gain. That is about 144 ft per mile of climbing, and 7,053 ft of descent. The course tops out at 4,594 ft and bottoms out at 1,888 ft. The surface is 77% trail, 14% gravel and 9% paved. The profile has 10 sustained climbs; the biggest is the climb from mi 28.1, +1,997 ft over 4.3 mi at 8.7% on average (steepest stretch 95%). Race day is May 1, 2027, starting at 7:00 AM; the sun rises at 6:06 AM and sets at 7:57 PM. Typical race-day weather at the start: a high of 70°F and a low of 44°F, with a 13% 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 10, 2026Added to the catalog
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