Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 21:15 finish (an estimate) · starting 7:00 AM May 1 · headlamp mi 60–the finish. Dark means the sun below civil twilight.
Climbs
16 climbs · 10,425 ft totalbiggest firstElevation gain, measured two ways
| Source | Gain | vs lidar |
|---|---|---|
| Course file (GPX) | 16,149ft | +16% |
| USGS lidar, 1 m | 13,867ft | 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 25, 2026. The planner still uses the course file.
Conditions 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 1 year of this race
Past editions
On race day it reached 71°F at the start, with a low of 45°.
| Year | Start °F | High point °F | Rain | Wind |
|---|---|---|---|---|
| 2026 May 1 | 71°/45° | 65°/38° | dry | 8mph |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line and the course high point (6,480 ft).
Reviews what runners who have been there say
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About this course
San Diego 100 — 2026 covers 100.1 mi (161.1 km) with 16,149 ft of elevation gain. That is about 161 ft per mile of climbing, and 16,152 ft of descent. The course tops out at 6,479 ft and bottoms out at 3,639 ft. The profile has 16 sustained climbs; the biggest is the climb from mi 51.5, +1,781 ft over 6.6 mi at 5.1% on average (steepest stretch 23%). Race day is May 1, 2026, starting at 7:00 AM; the sun rises at 6:00 AM and sets at 7:29 PM. Typical race-day weather at the start: a high of 66°F and a low of 43°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
- Oct 13, 2026Added to the catalog
Races like this one close in distance, climbing, terrain, altitude, weather and season
- San Diego 100 100 Miler Solo — 2027Apr · 100 mi · 161 ft/mi · CASame distance · Similar climbing · Similar weather
- San Diego 100 100 Miler Crewed — 2027Apr · 100 mi · 161 ft/miSame distance · Similar climbing · Similar weather
- Western States 100 — 2027Jun · 100 mi · 169 ft/mi · CASame distance · Similar climbing · High altitude
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