2026 Backyard Ultra is a trail running and running race on September 26, 2026 in Princeton, MA, with an entry fee of $35.
From the Organizer
Get ready to run until you drop, because on September 26th at Leominster State Forest we're hosting our 2nd annual Backyard Ultra!
What does that mean?
Every hour, runners must complete a 4.167 mile loop - a yard - until they can't. That's it! If you don't make it to the starting line at the turn of the hour, you're out! Once a final runner runs a yard alone, the race is complete.
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.
We will provide some light snacks, drinks(water, Gatorade, etc.), a porta potty, and a canopy (or two) for shade. Suggestions on what to bring include camping chairs, picnic blankets, your own food and water, a hat, first aid supplies, and a change of clothes. Additionally, you must wear blaze orange during the race, as we are in hunting season and the neighboring property is hosting a hunting event during a portion of our race.
The race begins at 10:00 AM so please arrive between 9-9:30 to allow for check-in and prep. Entry Fee: $35. If you sign up before August 31st, you'll also get a t-shirt!
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
71°
Typical Low
44°
Chance of Rain
35%
Based on US Climate Normals data from Barre Falls Dam, 8 mi from the venue.
Host City
City Elevation
1,126 ft
Nearest Airport
ORH
Worcester Regional Airport · 13 mi
Major Hub
BOS
Boston Logan International Airport · 45 mi
Time Zone
Eastern Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at 2026 Backyard Ultra, put it on the calendar, and turn “someday” into a start date.
29
Days to train
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From Endurance Grid
This race spans more than one sport — here’s a guide to each, so you can understand what’s involved and decide if it’s the right fit. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
Running off-road — dirt, singletrack, and mountain paths — from 5Ks to ultras. The terrain makes for an exciting twist and adventure in your running journey.
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
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Midstate Massive Ultra Trail
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2026 Backyard Ultra
Sep 26, 2026