Yukon Quest: 14 sled dogs, 4 mountain ranges, 1,000 miles – and total devotion

The sled dog race from Alaska to Canada is gruelling to say the least, but self-described 'Quest addicts' return year after year to test their limits

The toughest sled dog race in the world didn't disappoint in 2016. Blizzards, stranded mushers, charging bull moose - all featured on the 33rd annual Yukon Quest international sled dog race, an event that is more extreme wilderness challenge than competition.

"We were looking for the toughest sled dog race in the world, and this year we found it," said Rob Cooke, an ex-Royal Navy British-Canadian who finished on Thursday despite nearly pulling out halfway through.