Fiambala Desert Trail 50 Km Ultra Marathon

Race completed

50 km Distance

1,980 m Climbing

5.5 Grit · Challenging

27.6892° S, 67.6267° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 40 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Time limit 12 hours 14:24 min/km average. Comfortable. Room to walk the climbs and stop at aid. More forgiving than 73% of 50K races. Measured against 1058 races of the same distance. Cut-off calculator →

Field size ~224 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, May

Daytime high 17°C

Night low 2°C

Rainfall Dry — rain unlikely

Daylight 10 h 41 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 2512 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	224	Mario Enrique Pena Parra · 04:20:16	Renata Saurin · 05:18:02
2024	50km	213	Samuel Romeo Zerpa · 05:23:26	Cintia Stella Maris Sosa Chasampi · 07:08:43
2023	50km	220	David Armando Molina · 05:39:21	Maria del Valle Arenas · 06:54:06
2022	54km	133	Leandro Quiroga · 04:45:06	Deborah Davis · 06:03:13
2019	50km	127	Miguel Angel Peralta · 05:35:21	Maria Alejandra Matos · 06:54:37
2017	50km	83	Ezequiel Ramallo · 04:27:30	Lenka Mrazek · 05:28:52

The field grew 5% between 2024 (213) and 2025 (224). 35% of the 2025 field were women.

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

terrain This is a mountain course. Expect fast, runnable sections where rhythm is key.
gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 50 km of trail with 1,980 m of ascent.

Trail Running Shoes 40 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 1,980 m of ascent to walk up.
Headlamps A 12 h limit puts you out there after dark.

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

New Balance