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Running

The Micro: Breaking 4

Date
October 18, 2026
Distance
The Micro: Breaking 4
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From the Organizer

 

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.

Events

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Race Location

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What Are You
Waiting For?

Every finish line starts with a single decision. Claim your spot at The Micro: Breaking 4, put it on the calendar, and turn “someday” into a start date.

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Days to train

Race
The Micro: Breaking 4
Date
October 18, 2026

From Endurance Grid

About This Sport

Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.

With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.

Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.

Read the Guide

Running

From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.

Frequently Asked Questions (FAQs)

What is The Micro: Breaking 4?
The Micro: Breaking 4 is a running race held in Walker, Michigan on October 18, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
When and where is The Micro: Breaking 4?
Sunday, October 18, 2026 in Walker, Michigan at 1415 Maynard Ave SW, Walker, MI. Check the event page for exact start times and wave schedules.
How do I register for The Micro: Breaking 4?
Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.

The Micro: Breaking 4

Oct 18, 2026

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