In 2027, triathlon history will be made with the inaugural extreme triathlon in Antarctica. Dubbed A100, the event will bring together 50 elite athletes from around the globe to challenge themselves in one of the harshest environments on Earth. The race is scheduled from February 27 to March 8 on King George Island, near the Bellingshausen Station. The event is organized by triathlete and Ironman 70.3 AG world champion Ilya Slepov.
Designed with strict environmental considerations, the A100 course allows athletes to traverse only permitted zones, minimizing their impact on the fragile Antarctic ecosystem. The race covers 100 kilometers (62 miles), featuring a 1 km (0.6 mi) swim in the frigid Southern Ocean at temperatures around 0°C (32°F), a 66 km (41 mi) mountain bike segment, and a 33 km (20.5 mi) run across the icy terrain. The first athlete to complete the full route will be declared the winner.
Participation is limited to experienced long-distance triathletes, including those with prior Ironman or Ironman 70.3 experience. Competitors must also provide medical clearance confirming they can safely endure extreme cold and high winds. Although the race will take place during Antarctica’s most temperate window, with expected temperatures between -3°C and 5°C (27°F to 41°F), sudden weather changes—including snow, fog, and gusts up to 25 km/h (15.5 mph)—remain a significant challenge.
In preparation for the race, A100 will offer year-round support, including personalized guidance and training programs at a specialized research center simulating Antarctic conditions. Participants may also contribute to scientific studies monitoring human performance under extreme environmental stressors.
During the event, athletes will reside on sailing schooners moored near Bellingshausen Station, each guided by an expert familiar with Antarctic history and natural highlights. Competitors will have opportunities to explore iconic sites such as Melchior Islands icebergs, the Cuverville Island gentoo penguin colony, Lemaire Channel, and local whale-watching areas.
Registration for the A100 triathlon is now open via the official website: antarctic100.com.