Eranda
About this race
The OC half marathon
Pick your distance
Running
OC half marathon
Typical race-day weather
Based on 3 years of historical conditions on this event's race dates in Costa Mesa.
Course
Route map and elevation profile
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Other races near Costa Mesa
Different organizers, within 40 miles, in the next three months
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2026 Optimism Cal Tri Newport Dunes - 11.1.26
🏃 Plan Your Next Race in Costa Mesa
Find upcoming events by distance:
- Costa Mesa 5K Races 5 races
- Costa Mesa Running Calendar 2026 9 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 9 Costa Mesa events
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