Isabelle Ulfig
Desert running 3 (1)

I am an endurance athlete
triathlon, marathon, ultra distance running, and most recently, stage racing.


Have completed 17 full Ironman triathlons

  • Ironman Canada (4X)
  • Vineman Triathlon- 3rd place AG
  • Ironman Wisconsin (2X)
  • Ironman Arizona (2X)
  • Ironman USA – Lake Placid – (3X)
  • Great Floridian
  • Ironman Louisville
  • Ironman Coeur d’Alene
  • Ironman Florida
  • Ironman Texas

In 2014, I completed the Ironman “double header” of IM Florida and IM Arizona, 2 weeks apart.


Beginning in 2014/2015 I began to focus more on ultra distance running and have completed races at 50K, 50-mile, 100-mile distances including:

  • 2013 Wild Hare 50-mile – 1st Masters Female
  • 2014 Prairie Spirit 100-mile -9th Overall Female, 2nd in AG

I have completed over 80 lifetime marathon races – and one ultra distance swim! Great Chesapeake Bay Swim of 4.5 miles.

In April 2015 I raced the “Marathon des Sables” – a 155-mile, self-supported run across the Sahara in Morocco, described by National Geographic as “the toughest race on the earth”.


Next Up:

Feb. 14:  Austin Marathon

Aug. 29 – Sept. 4:  Fire and Ice Ultra – 250 km self-supported stage race in Iceland

Oct. 29:  Javelina Jundred – 100 miles

Dec. 31/Jan. 1:  New Year’s Double Double:  5K + marathon on New Year’s Eve, 5K + marathon New Year’s Day



TriFuel is perfect for fueling my long workouts and distance racing.  My stomach gets upset easily – especially later in a race– and TriFuel is the only hydration/calorie mix I have found to provide consistent & lasting energy without stomach upset.  It also travels very well (without melting or hardening) so works beautifully in my pack for longer stage races.