Aries Merritt, United States, crosses finish line, Men's 110m hurdles final, Stadium, London 2012, Olympic Games, London, England, United Kingdom, Europe

Usain Bolt after winning Men's 200m final, with finger to lips, Stadium, London 2012, Summer Olympic Games, London, England, United Kingdom, Europe

Usain Bolt crosses line with finger to lips, looks at Yohan Blake, Men's 200m final, London 2012, Olympic Games, London, England, United Kingdom, Europe

Usain Bolt crosses line with finger to lips, looks at Yohan Blake, Men's 200m final, London 2012, Olympic Games, London, England, United Kingdom, Europe

Competitor in the Annual World Bog Snorkelling Championships

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Action dropping the Spinnaker at Skandia Cowes Week 2008 Finish Line

Karstadt marathon, Ruhr marathon, starting in two cities, Oberhausen and Dortmund, finishing in Essen, here 5km away from the finish line, runners in front of UNESCO World Cultural Heritage site Zeche Zollverein, Essen, North Rhine-Westphalia, Germany, Eu

The start - finish line at Michigan International Speedway which features a two-mile race track and seats nearly 120, 000 fans for NASCAR races, Brooklyn, Michigan, USA, America

Motodrom, start and finish straight, Hockenheim Ring, Baden-Wuerttemberg, Germany, Europe

Triathlon, Mirjam Weerd, Netherlands, left, finish line of swimming competition, Ironman Germany, Frankfurt, Hesse, Germany, Europe

Three participants of the UTMB are running in the hills of Chamonix. The famous peaks of the Mont Blanc range are in the background. The Ultra-Trail du Mont-Blanc (also referred to as UTMB) is a single-stage mountain ultramarathon. It takes place once a year in the Alps, across France, Italy and Switzerland. The distance is approximately 166 kilometres (103 mi), with a total elevation gain of around 9,600 m. It is widely regarded as one of the most difficult foot races in Europe. It's certainly one of the largest with over two thousand starters. The combined participation in all of the events is approaching 10 thousand runners. While the best runners complete the loop in slightly more than 20 hours, most runners take 30 to 45 hours to reach the finish line.

An elderly woman is running in the hills of Chamonix. She is close to finishing the extremely exhausting UTMB race. The Ultra-Trail du Mont-Blanc (also referred to as UTMB) is a single-stage mountain ultramarathon. It takes place once a year in the Alps, across France, Italy and Switzerland. The distance is approximately 166 kilometres (103 mi), with a total elevation gain of around 9,600 m. It is widely regarded as one of the most difficult foot races in Europe. It's certainly one of the largest with over two thousand starters. The combined participation in all of the events is approaching 10 thousand runners. While the best runners complete the loop in slightly more than 20 hours, most runners take 30 to 45 hours to reach the finish line.

A Track With Three Lanes

Running Track With Six Lanes

Running Sculpture With a Downtown Background, Vancouver, British Columbia, Canada