Réunion Island, France · Date TBA

100 mi

Diagonale des Fous

165 km Distance
9,600 m Climbing
10.0 Grit · Elite / extreme
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What the course asks

Climbing rate 58 m / km Mountain. Significant climbing. Steep sections will require power hiking.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a mountain course. Poles are highly recommended for the sustained climbs.

By UltraHub Expert
👟 gear

With mountain terrain, choose a shoe with aggressive lugs (5mm+) for optimal performance.

By UltraHub Expert
🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 165 km of mountain with 9,600 m of ascent.

  • Trail Running Shoes58 m of climb per kilometre — grip and rock protection before cushioning.
  • Race NutritionPast 165 km the palate quits before the legs do — carry more than one flavour.
  • Hydration VestsPole attachment and chest-strap stability on steep ground.
  • Trekking Poles9,600 m of ascent to walk up.
  • Headlamps165 km almost certainly means running into the night.

inov-8

TrailFly Ultra G 300 Max

Graphene-enhanced grip with max cushion for ultra distance trail running.

$180 ★★★★★ 4.5

La Sportiva

Jackal II

Mountain-focused ultra shoe with FriXion XF outsole for aggressive grip.

$165 ★★★★★ 4.6

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

LEKI

Ultratrail FX.One

Ultra-light carbon folding poles (135g each) designed for mountain ultra racing.

$200 ★★★★★ 4.6

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7
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About

Cross Réunion Island diagonally through volcanic terrain and tropical forests.

Highlights

  • Volcanic island ultra
  • Tropical weather
  • Extreme elevation changes