In North of Nightfall, Darren Berrecloth takes on some of the longest lines ever ridden on a mountain bike. At the top of the world on Axel Heiberg Island, there are mountain bike lines topping 2,500 vertical feet. Through Darren’s eyes in this all GoPro footage edit, see what it’s like to ride these groundbreaking descents in an uninhabited and unexplored land.