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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • 12K
  • 12 km
  • San Francisco
  • Event weekend starts
  • Open entry

Bay to Breakers 12K

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2027 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

Official event website & entry ↗
Data current as of

Decision summary

Bay to Breakers 12K at a glance

Typical conditions
69/100

Historical race-date favourability, not a forecast

Evidence depth
23 verified facts

Source facts available

Route details

Known course facts at a glance

Methodology →

Bay to Breakers 12K has known course details for its 12k race. The summary below keeps the focus on what is confirmed for the course.

Official distance
12 km
Terrain
Road
Scenery
City, Coastal, Waterfront, Parkland

Quick answers

What runners ask first

How hilly is the Bay to Breakers 12K?

The Bay to Breakers 12K is described as rolling.

What is the Bay to Breakers 12K course like?

Underfoot, expect a road course. The setting includes city and coastal. Costume tradition, centipede team event (groups of runners tethered together), and a festive carnival-like atmosphere make this San Francisco's signature road race.

What should runners know on race day for the Bay to Breakers 12K?

Live music, bands and entertainment line the course; the event is part race, part moving street party.

Race character

Scenery

  • City
  • Coastal
  • Waterfront
  • Parkland

Terrain

  • Road
Elevation character
Rolling
Technicality
Non Technical

Entry, logistics and records

Records and field

Men's course record
33:31 (Sammy Kitwara)
Women's course record
38:07 (Lineth Chepkurui)

Entry requirements

Entry status
Open entry: The held registration model is open entry and this edition is not marked sold out.

Race day logistics

Expo / packet pickup
Packet Pickup & Race Expo held in the days leading up to race day
On-course music
Live music, bands and entertainment line the course; the event is part race, part moving street party

Course facts

Notable features
  • Costume tradition, centipede team event (groups of runners tethered together), and a festive carnival-like atmosphere make this San Francisco's signature road race

What are typical race-day conditions?

  • 14°CTypical temperature
  • 30 kphTypical wind
  • 1 mmTypical rainfall
  • 69Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (2)

Read the full methodology →