2026 Backyard Ultra
Princeton, MA
Sat, Sep 26, 2026
In 33 days · Sat, Sep 26, 2026
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Saturday, September 26th, 2026
Massachusetts State Route 31 in Leominster State Forest, Princeton MA
See race page
53–68°F · some rain risk
See last 10 years
On this date: rain 3 of the last 10 years
2025
61–76°F
dry
2024
55–67°F
rain
2023
46–61°F
dry
2022
54–69°F
dry
2021
56–67°F
dry
2020
56–77°F
dry
2019
55–78°F
rain
2018
62–78°F
rain
2017
66–85°F
dry
2016
44–65°F
dry
Best months to race in Massachusetts →
About this race
Overview
Get ready to run until you drop, because on September 26th at Leominster State Forest we're hosting our 2nd annual Backyard Ultra!
Race Format
- Loop Distance: Every hour, runners must complete a 4.167 mile loop - a yard - until they can’t.
- Start Time: If you don’t make it to the starting line at the turn of the hour, you’re out!
- Completion: Once a final runner runs a yard alone, the race is complete.
- Community: Whether you want to push yourself to your limits, mingle with new runners, or just want an excuse to be in the woods for a Saturday, you’ll be in the right place.
Amenities
- Refreshments: We will provide some light snacks and drinks (water, Gatorade, etc.).
- Facilities: A porta potty will be available on-site.
- Shade: A canopy (or two) will be set up for shade.
- What to Bring: Suggestions include camping chairs, picnic blankets, your own food and water, a hat, first aid supplies, and a change of clothes.
Safety Requirements
- Attire: You must wear blaze orange during the race, as we are in hunting season.
- Neighboring Event: The adjoining property is hosting a hunting event during a portion of our race.
Logistics
- Race Start: The race begins at 10:00 AM.
- Check-In: Please arrive between 9:00-9:30 AM to allow for check-in and prep.
- Entry Fee: $35.
- Early Registration Fee: Sign up before August 31st to receive a t-shirt!
More Information
For further details, visit the official race page: Backyard Ultra 2026.
Course map
Train with a club
Run clubs near Princeton to train with before race day.
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