Event

The Antarctic Ice Ultra™ is the ultimate ultramarathon on the frozen continent, offering distances of 50k, 81k (50-Mile), 100k, and 100-Mile, with separate male and female divisions. In addition, participants can choose to run a half marathon or full marathon, or join forces in the 24-hour Relay Race as a team.

Key Facts: The Antarctic Ice Ultra & Ultra-Running in Antarctica

Race Location

The event takes place at the Schirmacher Oasis, located on the Princess Astrid Coast in Queen Maud Land, East Antarctica. The course lies between the vast Antarctic Ice Sheet and the Novolazarevskaya (Novo) Ice Shelf.

100k Finishers: 68 to date

Between 2005 and 2017, and again in 2024 and 2025, a total of 60 men and 8 women completed the 100k in Antarctica as part of the Antarctic Ice Marathon & 100k, and the Antarctic Ice Ultra.

Men's 50k Record: 6:30:59

In the 2024 Antarctic Ice Marathon & 100k, John Armbrust (USA) finished 50k in 6:30:59 (6 hours 30 minutes 59 seconds).

Women's 50k Record: 5:15:43

In the 2017 World Marathon Challenge, Nahilia Hernandez (CUB/MEX) completed 50k in 5:15:43 (5 hours 15 minutes 43 seconds) and that stands as the official record of women's 50k in Antarctica.

Men's 50-Mile Record: 10:11:05

The official record for the Men's 50-Mile in Antarctica is 10:11:05 (10 hours, 11 minutes, 5 seconds), set by Marcin Aslanowicz (POL) during the 2024 Antarctic Ice Ultra.

Women's 50-mile Record: 14:51:44

The official record for the Women's 50-Mile in Antarctica is 14:51:44 (14 hours, 51 minutes, 44 seconds), set by Min Chen (CHN) during the 2025 Antarctic Ice Ultra.

Men's 100k Record: 9:20:28

The official record of men's 100k in Antarctica is 9:20:28 (9 hours 20 minutes 28 seconds), run by Yusheng Ni (CHN) in the 2024 Antarctic Ice Marathon & 100k.

Women's 100k Record: 15:31:10

The official record of women's 100k in Antarctica is 15:31:10 (15 hours 31 minutes 10 seconds), run by Julianne Young (AUS) in the 2012 Antarctic Ice Marathon & 100k.

Men's 100-Mile Record: 22:40:47

The official record is 22:40:47 (22 hours, 40 minutes, 47 seconds), achieved jointly by Yusheng Ni (CHN) in the 2025 Antarctic Ice Ultra. Previous record of 23:22:57 was set by Paul Johnson (USA) and Roberto Sembiante (USA) during the 2024 Antarctic Ice Ultra.

Women's 100-Mile Record:

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24-Hour Solo Race Record:

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24-Hour Team Relay Record:

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