Buttermilk Mountain Backyard Bash

MAY
9
2026
Test your endurance at this backyard style ultra race on the coastal trails of Kate Furbish Preserve East. Run 4.17 mile loops every hour through scenic single and double track paths for up to 50 miles total.
Sat 9 May 2026
Backyard Lap Buttermilk Mountain Backy...

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Buttermilk Mountain Backyard Bash

The Buttermilk Mountain Backyard Bash is a backyard-style ultra race held at the Kate Furbish Preserve East in Brunswick, Maine. The event takes place on coastal trails featuring a mix of single and double track paths. The course incorporates Buttermilk Mountain, which reaches an elevation of 121 feet.

The competition follows a specific backyard format where participants run a 4.17 mile lap every hour on the hour. To remain in the race, runners must finish each loop within the one-hour window. The event has a 12-hour cutoff time, allowing for a maximum total distance of 50 miles. Participants have the option to run as many or as few loops as they choose within these parameters.

  • 50 Miles (Maximum)

This event is self-supported, and nutrition is not provided for participants. The race location is approximately a 12-minute drive from the Bowdoin College campus. Registration fees are collected to cover race expenses, with all remaining proceeds donated to the Preble Street nonprofit organization. The preserve offers a natural setting for trail running on the Maine coast. Visit the organization's website for the most recent information.

50 mi
Buttermilk Mountain Backyard Bash
4 mi
Backyard Lap