British ultrarunner completes 2,850 km run along Europe’s Danube River

Kieran Alger ran the length of the second-longest river in Europe in 67 days

American ultrarunner completes barefoot trek of California’s John Muir Trail

It took Kenneth Posner 22 days to conquer the 210-mile route

Canadians smash national records at 100K World Championships

Julie Hamulecki and Bernadette Benson both crushed their own 100K Canadian records