Union Glacier, Antarctica, Chile · Saturday, December 12, 2026

Fixed Distance 100K

Antarctic 100k Race

55 days away
100 km Distance
not publishedn/a Climbing
5.0 est Grit · Challenging

Calculated from 100 km alone — the organiser has not published an elevation profile. Read 5.0 as a floor, not a verdict.

79.7500° S, 82.5000° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Field size ~1 Tiny. You will run alone for most of it.

DUV results for the 2024 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, December

Daytime high -11°C
Night low -15°C
Rainfall Dry — rain unlikely
Daylight Sun does not set

Regional 2001-2020 average for December — NASA POWER, grid elevation 717 m. Not a forecast.

Results history

Year Race Finishers Men's winner Women's winner
2024 100km 1 Yu-Sheng Ni · 09:20:28 —
2017 100km 10 Kurt Alderweireldt · 11:13:53 Sze-Ying (Jennifer) Cheung · 18:34:54
2016 100km 8 Griff Griffith · 12:18:40 Angela Chong · 21:11:09
2015 100km 10 Keith Whyte · 09:26:02 —
2014 100km 6 Pen-Bin Chen · 13:57:46 Adriana Istrate · 23:49:50
2013 100km 4 Petr Vabrousek · 11:21:46 Audrey McIntosh · 17:19:51
2012 100km 7 Marc de Keyser · 12:06:51 Julianne Young · 15:31:10
2011 100km 5 Clement Thevenet · 12:09:06 —
2011 100mi 1 Richard Donovan · 24:35:02 —
2010 100km 5 Bernardo Fonseca · 12:41:52 Clare Apps · 18:58:19

The field shrank 90% between 2017 (10) and 2024 (1). 0% of the 2024 field were women.

DUV results for the 2024 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

  • gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.
  • nutrition For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

Gear for this race

Chosen for 100 km of trail.

  • Trail Running Shoes 100 km of trail — cushioning that is still there in the last quarter.
  • Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
  • Hydration Vests Flask capacity for 100 km, without the bounce.
  • Headlamps 100 km almost certainly means running into the night.
  • Accessories Chafe and blisters end more 100 km races than fitness does.
All gear guides →

Similar races

Other 100K trail ultras, closest in distance first.