From Smoking to 100-Mile Victories: Thibault Delacroix’s Ultra Running Transformation

In 2018, Thibault Delacroix made a decision that would reshape his entire existence. The French native, then struggling with a smoking habit, laced up running shoes for the first time. Six years later, he stood atop the podium at Tasmania’s most grueling 100-mile race—twice consecutively.

Now based in Adelaide, Australia, Delacroix has become one of the most compelling figures in ultra running. His progression from complete beginner to elite ultramarathoner offers a masterclass in dedication, proper preparation, and understanding the critical role equipment plays in extreme endurance events.

Back-to-Back Tassie Trail Fest Victories

The Tassie Trail Fest 100-mile race cuts through Tasmania’s wilderness, demanding everything from competitors. In 2021, Delacroix crossed the finish line in 24 hours, 52 minutes, and 34 seconds to claim victory. Rather than rest on that achievement, he returned in 2022 and slashed nearly ninety minutes off his time, finishing in 23:23:43.

That improvement wasn’t accidental. It reflected refined training, better nutrition strategy, and crucially, optimized equipment choices developed through brutal trial and error across thousands of training miles.

The Hysterical Carnage Backyard Ultra

In 2023, Delacroix pushed into new territory by competing in his first backyard ultra format at Hysterical Carnage. These events strip away traditional race distances entirely. Runners complete a 6.7-kilometer loop every hour until only one remains standing. The format tests mental resilience as much as physical capability.

This experience deepened Delacroix’s understanding of equipment durability. When you’re running loops for potentially days, every gram matters differently than in point-to-point races.

The TripleCrownunder Grand Master Challenge

Delacroix’s ambitions scaled dramatically in 2024 when he pursued the TripleCrownunder Grand Master title. This requires completing three separate 200-mile races within a single calendar year across Australia: the Delirious WEST in February, the Irrational SOUTH in April, and the Unreasonable EAST in August.

Each 200-miler presents unique terrain challenges. The western race crosses arid landscapes where hydration becomes existential. The southern route navigates coastal weather variability. The eastern event climbs through mountain ranges demanding versatile footwear and layering systems.

Equipment Demands at 200 Miles

At distances beyond 100 miles, equipment selection separates finishers from drop-outs. Delacroix’s approach emphasizes redundancy without excess weight. Carrying backup lighting systems, multiple nutrition sources, and weather-adaptive clothing layers becomes non-negotiable.

GPS watches capable of multi-day battery life are essential. Standard running watches die before halfway in a 200-miler. Delacroix relies on units offering solar charging or extended battery modes that sacrifice some features for longevity.

Ultra Running Footwear Philosophy

Shoe selection for ultra events differs fundamentally from marathon racing. Delacroix rotates between multiple pairs during longer races, switching at crew access points based on terrain ahead. Rocky technical sections demand aggressive tread and toe protection. Smoother fire roads allow lighter, more responsive shoes.

Fit matters more than brand loyalty. After 100 miles, feet swell significantly. Shoes that felt perfect at the start become torture devices. Many elite ultrarunners, including Delacroix, size up specifically for race day to accommodate this inevitable swelling.

Hydration Systems for Extreme Distance

Hydration packs serve as the central equipment piece in ultra running. Delacroix uses vest-style systems that distribute weight across the torso rather than bouncing on the lower back. Front-mounted soft flasks allow drinking without breaking stride.

Capacity requirements vary by course. Self-supported desert sections might demand three liters minimum between aid stations. Races with frequent checkpoints allow lighter carries, trading hydration weight for speed.

Coaching Knowledge Applied to Equipment

As a UESCA-certified running coach, Delacroix brings analytical rigor to equipment choices. He doesn’t simply use what sponsors provide—he tests systematically, tracking performance metrics across different gear configurations.

This coaching perspective helps athletes he mentors avoid common mistakes. Beginners often over-pack, carrying emergency gear they’ll never need while neglecting essentials like proper lighting or adequate calories. Experienced runners sometimes under-prepare, assuming fitness will compensate for equipment failures.

Nutrition Gear and Strategy

Carrying enough calories for 24+ hours of movement requires careful planning. Delacroix relies on combination approaches: energy gels for quick absorption during intensity, solid foods during hiking sections, and real food options at crew access points.

Portable storage matters here. Running with pockets stuffed with wrappers becomes irritating after hours of movement. Purpose-built nutrition pouches on hydration vests keep food accessible without bouncing or creating waste management problems.

Lighting Systems for Night Running

Any ultra event crossing 100 miles involves darkness. Delacroix runs with both a headlamp and handheld flashlight during night sections. The combination provides depth perception that single-source lighting cannot match on technical terrain.

Lumen output matters less than beam pattern for trail running. Narrow focused beams work for flat roads but create tunnel vision on winding singletrack. Wider flood patterns reveal peripheral obstacles and improve reaction time on descents.

Recovery Equipment Between Races

The TripleCrownunder challenge compressed three 200-milers into months, not years. Recovery between events became as important as training. Delacroix employs compression gear, percussion massagers, and structured sleep optimization to accelerate adaptation.

This recovery equipment often gets overlooked in ultra running discussions focused on race-day gear. But sustainable performance at extreme distances requires treating recovery as seriously as training itself.

The Adelaide Ultra Running Scene

Relocating from France to Australia placed Delacroix within one of the world’s most active ultra running communities. The Adelaide Hills offer technical trails at altitude. The Flinders Ranges provide remote wilderness training. Coastal paths allow flat high-mileage weeks.

This geographic diversity means Delacroix can train specifically for different race demands without traveling extensively. Equipment testing happens on terrain matching upcoming event profiles rather than generic local routes.

Following Thibault Delacroix’s Journey

Ultra running rewards patience, preparation, and intelligent equipment choices. Delacroix’s transformation from smoker to multi-time 100-mile champion demonstrates what’s possible when someone commits fully to the sport.

His pursuit of increasingly ambitious goals continues pushing boundaries of what he thought possible. For fans interested in ultra running’s elite level, following athletes like Delacroix on Peaxel offers insight into the dedication required at the sport’s cutting edge. Athletes such as Whitney Dancaster similarly represent this caliber of commitment in the American ultra scene.