# When does San Diego 100 2027 registration open?

Registration for San Diego 100 2027 opens on 2027-01-01, the organiser's date (in 66 days).

- Organiser: San Diego 100
- Sport: ultra
- Where: Julian, US
- Site: https://sandiego100.com/
- Registration page: https://sandiego100.com/
- Race day: 2027-04-30
- Registration status: registration closed (checked 2026-10-27)
- Entry route: first-come
- Registration window: 2027-01-01 to ?
- Places, as stated: registration will remain open until the race has 300 entrants

25th annual, starts Friday April 30th, 2027 at 0600 in the Cuyamaca/Laguna mountains; Western States qualifier; first-come, first-served.

## Quick answers

**When does San Diego 100 2027 registration open?**

Registration for San Diego 100 2027 opens on 2027-01-01, the organiser's date (in 66 days).

**How do I find out the moment San Diego 100 2027 registration opens?**

Race Entry Watch reads the registration page every night, hourly in the week before a stated opening date and every ten minutes on the day itself. The free weekly digest is on this page; the same-day email, the moment it opens, is the membership (4 USD a month) or a 30-day pass (5 USD once).

## Sources

- https://sandiego100.com/ (read 2026-10-27)

## Changes

- 2026-10-27: record added

Canonical: https://bikoosh.com/races/when-does-san-diego-100-registration-open
Race Entry Watch is an independent, sourced tracker, not affiliated with any organiser. Every status is read on the event's own registration page on the date shown; dates and fees are quoted as the organiser states them; an entry is yours to make on the organiser's site.