An ultramarathon, also called ultra distance or ultra running, is any footrace longer than the traditional marathon length of 42.195 kilometres. Various distances are raced competitively, from the shortest common ultramarathon of 50 kilometres (31 mi) to over 200 miles (320 km). 50k and 100k are both World Athletics record distances, but some 100 miles (160 km) races are among the oldest and most prestigious events, especially in North America.
Dean Karnazes, is an American ultramarathon runner, and author of Ultramarathon Man: Confessions of an All-Night Runner, which details ultra endurance running for the general public.
Ann Trason is an American ultramarathon runner from Auburn, California. She set 20 world records during her career and is considered to be the most successful female ultrarunner of all time.
Scott Gordon Jurek is an American ultramarathoner, author, and public speaker. Throughout his running career, Jurek was one of the most dominant ultramarathon runners in the world, winning the Hardrock Hundred (2007), the Badwater Ultramarathon, the Spartathlon, and the Western States 100 Mile Endurance Run (1999–2005). In 2010, at the 24-Hour World Championships in Brive-la-Gaillarde, France, Jurek won a silver medal behind Shingo Inoue and set a new US record for distance run in 24 hours with 165.7 miles. Jurek has followed a vegetarian diet since 1997, and a vegan diet since 1999.
Nikki Kimball is an American distance runner specializing in the Ultramarathon. She ran her first 100-mile race at the Western States 100 Mile Endurance Run in 2004, and was the female winner. She was the winning female at Western States again in 2006 and 2007, becoming only the third woman to win Western States three times. In 2014, she won the Marathon Des Sables multi-stage endurance race on her first attempt. Prior to running, her main sport was cross-country skiing. She was crewed at the 2007 Western States by U.S. Senator Max Baucus of Montana, where Kimball lives. She lives in Bozeman, Montana.
Magdalena Lewy-Boulet, commonly known as either Magdalena or Magda Boulet, is an American runner from Oakland, California. Born in Jastrzębie-Zdrój, Poland, Lewy-Boulet became a U.S. citizen on September 11, 2001.
Michael Wardian is an American marathoner and ultra-marathoner. He won the 2008, 2009 and 2010 US 50 km championships and the 2011 US 50 mile championship. In 2008, he won the U.S. National 100 km championship. Wardian also is the 2007 JFK 50 Mile winner, and won the National Marathon in Washington D.C. three consecutive years (2006–2008), and in 2010, 2011 and 2012. He ran in Maldives Addu marathon on 29 June 2018 and got first place and MVR12000. In 2020, Wardian won the Quarantine Backyard Ultra, running nearly 263 miles over the course of 63 hours without sleeping in a repetitive neighborhood loop in Arlington, VA to follow social distancing guidelines during the coronavirus pandemic.
Molly Huddle is an American long-distance runner who competes in track and cross country running events. She held the American record in the 5000 meters set in 2014 in Monaco (14:42.64), which has since been lowered by Shannon Rowbury and Shelby Houlihan. Huddle held also the American record in the 10,000 meters set at the 2016 Rio Olympics with a time of 30:13.17, which has since been lowered by Alicia Monson.
Karl Meltzer is an ultrarunner and ultrarunning coach based in Sandy, Utah. Meltzer has won more 100-mile ultramarathons than any other ultramarathoner, and has held speed records at major U.S. trails, including the Appalachian Trail and the Pony Express Trail. Meltzer's trail runs have been featured in news outlets from Ultrarunning.com to NBC Sports. Meltzer has been a professional ultramarathoner since 1999, and a coach since 2007.
Desiree "Des" Nicole Linden is an American long-distance runner. She represented the United States in the 2012 London Olympics and the 2016 Rio de Janeiro Olympics women's marathon. In 2018, she won the Boston Marathon, becoming the first American in 33 years to win the woman's category in the event. She holds the women's 50K world record of 2:59:54.
Dave (David) Mackey, born November 22, 1969, is a professional American ultra runner and adventure racer who lives in Boulder, Colorado. Mackey has set course records at many significant national ultra-distance trail running races, and spent several years adventure racing nationally and internationally.
The Ottawa Self-Transcendence 24 Hour Race was part of a triple Ultramarathon race in the National Capital Region Ottawa, Ontario, Canada. Organized by the Sri Chinmoy Marathon Team the run took place in July. For many years, this race was held on an outdoor track at the Terry Fox Athletic Facility, and then indoors at the Louis Riel dome, on a 400-meter track. Since 2017, the race was held outdoors at the Asticou Training Centrein Gatineau, Quebec. Runners from Canada and all over the world participated. It was the longest-running 24 hour race and oldest timed ultrarace worldwide. Runners from Canada and all over the world participate.
Jacquelyn Camille Herron is an American ultramarathon runner.
Harvey Sweetland Lewis is an American ultrarunner.
The IAU 24 Hour World Championship is an annual international 24-hour run competition organised by the International Association of Ultrarunners (IAU).
Christo Landry is a United States distance runner who has won multiple USA Road Championships and holds the American record in the 25 km distance.
Kate Grace is an American middle-distance runner. A multiple All-American runner for Yale University, she turned professional in 2011. Grace competed for the United States at the 2016 Summer Olympics, making it to the final of the 800 metres.
Sage Clifton Read Canaday is an American long-distance runner and ultramarathoner.
Donald Alexander Ferguson Ritchie was a Scottish ultramarathon runner.
United States 