Backyard Ultra in New Town

OCT
10-11
2026
Read all about the Backyard Ultra in New Town on 10-11 Oct 2026 in Saint Charles.
10-11 Oct 2026
4.17 Mile Loop

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Event Details

This is the second annual Backyard Ultra marathon in New Town, Missouri. It takes place in October.

Course Format

The event involves runners completing a loop of 4.17 miles each hour. Participants have until the start of the next hour to finish each loop and begin the next one. It is a "last person standing" format. The race officially has volunteers until a specific time on Sunday, which corresponds to running 116.8 miles. If two runners remain at that point, accommodations will be made to continue.

Registration and Fees

The registration fee is $25. To run each loop, participants must contribute one dollar to a communal race jar. The winner receives half of the money collected, while the other half is donated to the MSMDS charity.

Participant Details

Each participant who completes a loop receives a custom DNF token. Runners can also join for individual loops at any hour, though they are not eligible for the overall prize jar.

Venue and Amenities

The race starts at the amphitheater in New Town, Saint Charles. This area includes registration, the lap start point, bathrooms, and a space for runners to set up between loops for refueling and relaxing. Nearby amenities include multiple restaurants, a coffee shop, and ice cream shops.

Charity Focus

The event supports Multisystemic Smooth Muscle Dysfunction Syndrome (MSMDS), an ultra-rare genetic disease. Visit the organization's website for the most recent information.

4 mi
4.17 Mile Loop