The Micro: Breaking 4
The Micro: Breaking 4 logo

The Micro: Breaking 4

Walker, Michigan, United States View on map
Oct 18, 2026 (America/Detroit local time)
Running

About this race

 

A Race Series Designed by Runners, for Runners
In 2021 we created the McKirdy Micro Marathon series to help athletes run a personal best and qualify for the Boston Marathon or beyond. At the time, we were just coming out of the COVID-19 pandemic where opportunities to run fast times were limited and motivation to continue training was difficult with no races on the calendar.

In 2023, we took the same concept and applied it at an elite level, hosting a race for athletes targeting the USATF Olympic Trials Qualifying Standard (OTQ) or the Olympic Standard. Many “on the cusp” athletes find they have limited options for races that are both fast and will provide the support they need to run their best.
Athletes from all over the world came to participate in a small localized race with the potential for massive impact. When the day was done:

48 athletes ran under the 2:18:00/2:37:00 OTQ Standard
More OTQs came from our race than any other race in 2023
Our race produced 2 Olympians
69% of the finishing athletes ran a personal best
85% of the finishing athletes ran their second fastest lifetime marathon

Moving forward, we are expanding the series to bring the McKirdy Micro race experience to athletes of all abilities over multiple distances! We hope you’ll come run your fastest marathon with us.

Pick your distance

Running

The Micro: Breaking 4

Oct 18, 2026 Marathon 8:00 AM
Closed

Typical race-day weather

Based on 1 year of Open-Meteo archive data for this event's race dates in Walker, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) 8.3° / Maximum temperature (race-week average) 18.0°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) 6.3° / Maximum feels like — heat index / wind chill (race-week average) 18.0°
Peak wind (km/h)
Strongest wind of the day (race-week average)
14.3
Precip (mm)
Precipitation over the day (race-week average)
0.2mm
Humidity
Mean relative humidity (race-week average)
74.4%
Sunrise
Sunrise at the start line on October 18, 2026 (EDT)
Sunset
Sunset at the start line on October 18, 2026 (EDT)
Daylight
Hours between sunrise and sunset on race day
10h 55m

The sun rises at 8:00 AM and sets at 6:55 PM local time (EDT) in Walker on October 18, 2026 — 10h 55m of daylight.

Course

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.

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Other races near Walker

Different organizers, within 40 miles, in the next three months

Find upcoming events by distance:

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, 7 Walker events

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