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Registration opens February 20!
A backyard ultra is a type of endurance running race with a very simple but brutal format: runners must complete a set loop (usually 4.167 miles / 6.7 km) every hour, and they keep doing laps until only one runner is left capable of finishing the next loop. If more than one runner completes the same number of loops and then no one finishes the next one, the race has no winner.
In other words:
• 🕐 At the start of each hour, runners set out on the loop.
• 🏃♂️ They must finish before the hour is up.
• 📍 If they finish early, they can rest until the next hour begins.
• 🚫 Once a runner fails to complete a loop within the hour, they’re out.
• 🏆 The race continues until only one runner completes a loop that no one else can.
This format means the total race distance and duration are unknown beforehand — it lasts until all but one runner drop out. The name “backyard ultra” comes from the idea that it’s informal and could be run “in a backyard,” and it was popularized by endurance runner and race director Lazarus Lake (Billy Wilson).
It’s a test of strategy, durability, and mental toughness as much as speed — runners pace themselves carefully and deal with cumulative fatigue over potentially hundreds of miles and hours.
𝐑𝐮𝐥𝐞𝐬 𝐟𝐨𝐫 𝐭𝐡𝐞 𝐁𝐚𝐜𝐤𝐲𝐚𝐫𝐝 𝐔𝐥𝐭𝐫𝐚
1) Course
. Race route with a total (at least) of 6.7056 kilometers
2) Starting Corral
. Measured to fit entire starting field
. Corral stays the same size thru out the event
. Participants must be in the starting corral at the bell or is DQed
3) Starts
. Each loop starts precisely 1 hour after the last
. Warning must be given 3, 2, and 1 minutes prior to start
. All competitors must start at the bell (no late starts)
4) Loops
. Except for restrooms, competitor may not leave the course until each loop is completed
. No non-competitors on the course (including eliminated runners)
. No personal aid during a loop (common aid stations are allowed)
. Each loop must be completed within an hour to be counted… including the final lap.
. No artificial aids (including trekking poles)
. Slower runners must allow passes.
5) Timing
. Timing of the loops is optional
6) Winner/Results
. The winner is the last person to complete a loop
. All others are technically DNF
. Results of each runner in terms of distance covered are to be given.
. If no runner can complete one more loop than anyone else, there is no winner.
7) Cap
. Race must be open ended
Note:
Personal crews are allowed near the starting corral only
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