Cobscook Backyard Ultra

April 26th 2026
Edmunds, ME

Cobscook Backyard Ultra - 50K or 50 miles

The Event: Come and run an easy 5 Km or 4.167 mile (6.706 Km) loops - just a stroll in the Park!  If you want to spend Sundayl in the beautiful Cobscook Bay State Park running and walking your first, or a different kind of, 50 Km or 50 mile Ultra with a great group of people, then why not sign up and join the fun? Or bring 1 or more friends and split the distance between you as a team entry.

If you can run/walk 3.1 miles in 1 hour then do it again next hour, and then again for 10 laps/hours in total, then you can finish a 50K in 10 hours. Or if you don't think you can do it all alone, find a friend or two and divide it up as a Relay Team of 2 or 3, just so long as one team member completes each lap.

Or run/walk 4.167 miles each hour over and over again for 12 laps/hours in total for a 50 miler.  Again, do it as an individual or as a Relay Team of 2 or 3, just so long as one member completes each lap.

The course is on vehicle free park gravel roads and will be well marked with arrows at every intersection. The 4.167 mile loop will overlap with the 5K loop for the most part with an additional 0.57 Km out and back to make up the difference.  Course Map 50k click here Course Map 50mi Click here

We’ll follow modified Backyard Ultra protocols – starting at 9am 50 Km runners will do one 5 Km loop, then do the 5K loop again at 10:00am, then again at 11:00am etc. through to starting the last lap at 6:00pm for 10 x 5K = 50K. When you finish a lap you'll likely have time to spare before the next one starts, so take a break, grab a drink/grub and wait for the next hour to come round. We will have a 5 minute warning bell before the start of the next lap. If you are not on the start line on the hour, because you haven’t finished the last lap or you've fallen asleep or whatever, then you are finished at however many loops you have completed.  The event ends after 10 hours so the furthest you can go is 50kms.

50 mile runners will start earlier, at 7:00am and do a 4.167 mile loop, then do it again at 8:00am, etc. as with the 50 K runners - every hour and starting the last lap at 6:00pm alongside the last lap for the 50 K runners.

Results

Date Finishers Top Result (F) Top Result (M)
04/26/26 Race Cancelled
04/21/24 9 4:17:49 4:10:36
Date Finishers Top Result (F) Top Result (M)
04/26/26 Race Cancelled
04/21/24 1 8:42:46

Weekly Newsletter

A roundup of the week's content and most recent race results. Sent once a week on Thursday.

Recent Results

Hoof It on the Hill
Cherry Creek, NY - 9 finishers
52 KM
The Sticks
Norton, KS - 72 finishers
72 Hours | 48 Hours | 24 Hours | 12 Hours | 6 Hours
Spence Mountain Run
Klamath Falls, OR - 11 finishers
50 KM
Yankee Springs Trail Run
Middleville, MI - 60 finishers
100 KM | 50 KM
Pacifico Ultra
Palmdale, CA - 117 finishers
50 KM
Echo Valley Runs
Chelan, WA - 80 finishers
50 KM
Lake to Ocean 100K
Port Mayaka, FL - 19 finishers
100 KM
Lake Tye Challenge
Monroe, WA - 25 finishers
12 Hours | 6 Hours
Hotfoot Hamster
Buckeye, AZ - 94 finishers
24 Hours | 12 Hours | 6 Hours
Worlds End Ultramarathons
Forksville, PA - 299 finishers
100 KM | 50 KM
View All Results