WWF's annual Climb for Nature returns to CN Tower this weekend

This weekend over 6,000 people will climb the CN Tower's 1,776 steps as part of WWF's annual CN Tower Climb for Nature.

WWF-Canada and climbers aim to raise more than $1 million for wildlife conservation over two days.

The climb for Saturday is sold out but some space remains for Sunday.

This is the 32nd year for the event.