Nono, Traslasierra, Argentina · Saturday, July 11, 2026

Fixed Distance 50K

Nono Ultra Trail Ansilta - Petzl

Race completed

50 km Distance

1,650 m Climbing

5.0 Grit · Challenging

31.7941° S, 65.0083° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 33 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 18 hours 21:36 min/km average. Generous. Walkable throughout for most of the field. Among the most forgiving 50K cut-offs we track. Measured against 1063 races of the same distance. Cut-off calculator →

Field size ~262 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, July

Daytime high 14°C

Night low 0°C

Rainfall Dry — rain unlikely

Daylight 10 h 11 m of light

Regional 2001-2020 average for July — NASA POWER, grid elevation 1152 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	262	Fernando Ruben Mendieta · 05:25:49	Laura Moratorio Bidegain · 06:52:24
2024	50km	387	Fernando Ruben Mendieta · 05:17:56	Patricia Alejandra Fernandez · 07:20:21
2023	50km	354	Fernando Ruben Mendieta · 05:10:56	Daiana Araceli Espierrez · 07:18:52
2022	50km	130	Jesus Antonio Aguero · 04:48:51	Maria Florencia Reynoso Vico · 07:06:20

The field shrank 32% between 2024 (387) and 2025 (262). 26% 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 rolling 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 1,650 m of ascent.

Trail Running Shoes 33 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 1,650 m of ascent to walk up.
Headlamps A 18 h limit puts you out there after dark.

Salomon

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

Spring Energy

Awesome Sauce

Real food gel with 180 calories. Rice-based with natural flavors.

$4 ★★★★★ 4.6

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

Black Diamond

Distance FLZ

Lightweight folding trekking poles with FlickLock Z adjustment. 340g per pole.

$170 ★★★★★ 4.7

Petzl

NAO RL

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

$150 ★★★★★ 4.7

All gear guides →

Overview

The Nono Ultra Trail Ansilta - Petzl was a 50k trail race held in Nono, Traslasierra, Argentina, with 4 editions from 2022 to 2025. It featured 1650m of elevation gain over 50km, making for 33m of climb per kilometer.

With a field of 262 finishers in its latest edition, this race had a field bigger than 94% of 50k fields and smaller than 6%. The 18-hour time limit allowed for a 21.6 minutes per kilometer pace, which was more generous than 97% of 50k cut-offs and tighter than 3%.

Similar races

Other 50K trail ultras, closest in distance first.