2026 Registration Opening Soon!
Registration for the 2026 event will open at 12pm EST on March 2, 2026! Early bird pricing will only be available through March 7th, so mark your calendars and make sure you secure your spot. Follow us on Instagram (@themicro.run and @mckirdytrained) to connect with the community and stay updated as we get closer to race day. We hope to see you in Grand Rapids this October!
There are currently no events.
October 18, 2026
Millennium Park, Walker, MI
(just southwest of Grand Rapids, MI)
What is The Micro: Breaking 4 Marathon All About?
Instead of hosting open-field races, we design controlled performance environments around one specific time standard. That focus allows us to dial in the details, providing each athlete with in-race amenities that are often reserved for only a handful of elite runners in most marathons. These details may seem small, but they can be the deciding factor in the outcome of your race.
You do the training.
We build the environment for optimal race-day execution.
Breaking 4 is built for athletes chasing a marathon time that starts with 3. Here’s what that looks like on course:
Who is This Race For?
Although anyone may register, this race is optimally designed for those athletes who are looking to run in the 3:20-4:00 range in the marathon this fall.
The race will have as many 4 hour pace groups as necessary in order to keep pace group size manageable and reasonable. We also plan to have pacers for 3:25, 3:35, and 3:45. We will adjust pace groups as needed as the field fills. The race directors will keep participants updated on changes to the pace groups as we get closer to race day.
What Does My Registration Fee Include?
Your registration fee entitles you to all of the race perks mentioned above, including your own personal fluids, as well as private content and communication with the race directors and other participants. The race directors will provide guidance on utilizing all amenities via email and Zoom calls that take place between registration opening and the day of the race.
You won't be left guessing - on average, we host 2-3 Zoom calls plus a technical meeting for every marathon so there are plenty of opportunities to understand more and ask any questions you have. All of this is covered under the cost of your registration.
Registration Pricing
March 02 - March 08: $165
March 09 - April 19: $185
April 20 - July 31: $225
August 01 - September 15: $250
Registration closes on 09/15/26 or whenever we sell out. For more info on deferrals, refunds, and transfer, head to the Race Info page.
