Ultra Running Hub Fontenais, Switzerland · Saturday, April 17, 2027
Fixed Distance 50 mi
Trail de Calabri
213 days away
70 km Distance
3,630 m Climbing
8.9 Grit · Elite / extreme
What the course asks
Climbing rate 52 m / km
Mountain. Significant climbing. Steep sections will require power hiking.
Time limit 14 hours
12:00 min/km average. Generous. Walkable throughout for most of the field. About average for a 50 mi. Measured against 455 races of the same distance. Cut-off calculator →
Field size ~119 Mid-sized. Company early, well spread out by halfway.
DUV results for the 2026 edition (70km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
The Aid Station
Course-specific beta from the community
This is a mountain course. Poles are highly recommended for the sustained climbs.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 70 km of trail with 3,630 m of ascent.
- Trail Running Shoes52 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition70 km of self-supported fuelling between aid stations.
- Hydration VestsPole attachment and chest-strap stability on steep ground.
- Trekking Poles3,630 m of ascent to walk up.
- HeadlampsA 14 h limit puts you out there after dark.
Similar races
Other 50 mi trail ultras, closest in distance first.