In May 1985 two climbers, Joe Simpson and Simon Yates, left their base camp by a lake and stared climbing the north face of a mountain called Siula Grande in the Reruvian Andes. this climb was incredibly dangerous but the two men were experirnced climbers and physically fit. on Day 1, the weather eas good and the climb began well. At night they made a snow cave and slept on the side of the mountain.