
Explore the
Extremo Sul Ultramarathon
Extremo Sul Ultramarathon is a fast, flat trail ultramarathon set in Rio Grande do Sul, Brazil, taking place on 22 Nov 2026. With entry from 381 EUR, it offers great value for a memorable race day.
The Course Profile
Whether it is a trail road or a challenging city circuit, the route is designed to push your limits.
Athlete Support
Strategically placed hydration stations and cheering zones to keep your momentum high until the very end.
The Finish Line
A grand celebration awaits every finisher. Experience the roar of the crowd and earn your exclusive medal.
A premier international racing destination.
A trail course designed for peak performance.
226km
Experience the electric vibe from start to finish line.
Prepare for the
Extremo Sul Ultramarathon Experience.

Race Day Readiness
Environment
Event Protocol
Official Timing
& Results
Electronic timing chips provide accurate race data. Be sure to follow all start-zone protocols for a valid finishing time.
Safety &
Participant Support
Dedicated medical and support teams are stationed along the entire course to ensure a safe environment for all athletes.
Global Standards
Extremo Sul Ultramarathon World-Class Course
A professionally measured and sanctioned route designed to provide a premium racing experience in the heart of the city.
How Back My Run
Transforms Your
Extremo Sul Ultramarathon.
We bridge the gap between runners and their supporters, turning a solitary challenge into a shared triumph through the power of voice.
Mental Strength at the Wall
When you hit the tough miles of the Extremo Sul Ultramarathon, your phone triggers messages of encouragement exactly when your pace drops or you reach certain milestones.
Family Presence
Even if your loved ones can't be at the finish line in person, their voices will be right there in your ears, pushing you through every kilometer.
Global Support Network
Supporters from anywhere in the world can record their messages. Distance is no longer a barrier to being part of your Extremo Sul Ultramarathon journey.
Lifetime Memories
After the race, you get to keep all those emotional voice notes forever. It's not just a race result; it's a collection of love and support.
From Start Line
To The Finish.
Experience the future of race-day motivation in three simple steps.
Download The App
Choose the Extremo Sul Ultramarathon and create your event in less than a minute.
Collect Support Messages
Share your unique link with friends and family so they can record motivational voice notes for your Extremo Sul Ultramarathon journey.
Run & Receive Motivation
As you reach key milestones in Extremo Sul Ultramarathon, supportive voice messages automatically play through your headphones.
Start collecting Voice notes from friends and family!
Everything You NeedTo Know
Answers to common questions about using Back My Run for the Extremo Sul Ultramarathon.

Support
is Confirmed!
Empower Your Runner In Extremo Sul Ultramarathon
Don't just watch from the sidelines. Create a personalized motivational network that delivers your voice directly to their ears when they hit the target.