Pollution forces runners in Sunday's Beijing International Marathon to don face masks
Thirst for victory competes with thirst for booze in event where competitors raise their glasses long before they cross the finish line
Jogging through Mongolian grasslands. Sprinting past the temples of Angkor Wat. These races prove it's not always best to take things slow
Ultra-green cars, video game booth babes and the world's newest gigantic supertower: So, how come you haven't booked a flight yet?
You'll get worn out just reading about these run and assault courses, Yak Attacks and desert marathons