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Texas Backyard Ultra Series

October 10, 2026
Lake Bastrop South Shore Park
Bastrop, TX 78602 US

The Gauntlet

Last Frontier Series (Backyard Ultra Variant)
The
Gauntlet.

Every backyard ultra runs on the same number. 4.1667 miles, every hour, until one person is left. It's a good format. It's also a format every runner in Texas has already trained for.

The Gauntlet doesn't ask you to run the same mile forever. It asks you to keep up with a race that keeps getting harder underneath you.

 
 
Two Series, Different Math

Last Frontier runs two backyard ultras

One holds the difficulty constant and lets the hours wear you down. The other changes the difficulty on you every eight hours. Same family, same rules of last person standing, opposite philosophy.

The Standard Series
Rodeo · Austin's · Big Bastrop · Gulf Coast
Loop4.1667 mi, fixed
Pace to holdWhatever 4.1667 mi/hr takes
ProgressionNone. Same loop every hour
What breaks youAttrition against a constant
The Gauntlet
Canyon of the Eagles · Bluebonnet · Labor Day · Fields of Gold
Loop4 → 5 → 6 → 7 mi, then locked
Pace to hold15:00 → 12:00 → 10:00 → 8:34 /mi
ProgressionEscalates every 8 hrs, until hour 33
What breaks youA moving target, then a fixed one

 

The Rules

The ground shifts every eight hours

You start easier than the standard format. Then the loop grows and the pace tightens, whether you're ready or not. Four times, right up until the ramp runs out.

HRS 1 TO 8
15:00
HRS 9 TO 16
12:00
HRS 17 TO 24
10:00
HRS 25 TO 32
8:34
HRS 33+
8:34
 
 
 
 
 
4 MI
5 MI
6 MI
7 MI
THE WALL
HOUR 1HOUR 32HOUR 33 → ∞
HoursLoopPace you need to hold
1 to 84.0 mi15:00 /mi
9 to 165.0 mi12:00 /mi
17 to 246.0 mi10:00 /mi
25 to 327.0 mi8:34 /mi
33+7.0 mi8:34 /mi
On the hour, every hour, for as long as anyone answers the bell.
 

Hour 33

The Wall

By hour 33, the loop stops growing. It holds at 7 miles, on the hour, every hour, at 8:34 pace, for as long as anyone can answer the bell.

176 Miles Just To Get Here

Everyone who's still standing when the loop hits 7 miles has already covered 176 miles to get there. What happens next isn't a race anymore. It's whoever can keep finding 8:34 pace, hour after hour, with less and less left to find it with.

Whoever answers the bell after everyone else has stopped earns the only title The Gauntlet gives out: Sole Survivor.

 
Why This, Not Just A Bigger Loop

The race you started isn't the race you finish

We could have built The Gauntlet by just raising the standard series' number: a fixed 5 mile or 6 mile loop, every hour, forever. We didn't want that. A fixed hard loop still punishes everyone equally from hour one. It just fills the DNF board faster and calls itself a different race.

The Gauntlet starts slightly gentler than Rodeo, Austin's, Big Bastrop, or Gulf Coast. The first eight hours are more forgiving than the standard format, not less. That's on purpose. The difficulty isn't in any single hour. It's in the fact that the race you're running at hour 20 is not the race you signed up for at hour 1, and there's no going back to the easier version once it's gone.

That's also what makes The Wall mean something. Nobody arrives there fresh. Everybody standing at 7 miles has already survived three versions of this race before the hardest one even starts.

 
Where To Find It

Four stops, one arc, New Year's to October

The Gauntlet has its own four race calendar, separate from the standard series' four venues. Every stop runs the identical format, start to Wall: same loop, same ramp, same 8:34 pace waiting at the end. What changes is what it means to win.

 
 
Canyon of the EaglesOPENER
Burnet, TX. New Year's Eve into New Year's Day

First blood. First name on the board for the season.

 
 
Bluebonnet Trail Run
Marble Falls, TX. Spring
 
 
Labor Day Trail Challenge
Labor Day Weekend
 
Fields of GoldFINALE
Marble Falls, TX. October

Whoever is still standing here in October is the season's Sole Survivor, the one everyone remembers.

 
The Only Question That Matters

Every runner who lines up at a Gauntlet start already knows how to survive a backyard ultra. That was never going to be the test. The test is what's left of you at hour 33, when the loop stops changing and the only thing left to do is keep answering the same impossible bell.

How far can you take The Wall?

One name left standing. One title: Sole Survivor.

CANYON OF THE EAGLES BLUEBONNET LABOR DAY FIELDS OF GOLD
THE GAUNTLET / LAST FRONTIER SERIES

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