The mountain known for its challenging climbing conditions and treacherous weather is K2. Located in the Himalayas, K2 is the second-highest peak in the world, and it is notorious for its extreme difficulty and deadly avalanches. Climbers face severe weather changes, altitudes, and technical climbing challenges. The mountain's remoteness and dangerous conditions have resulted in fewer successful summits compared to Everest, making it a coveted achievement for mountaineers worldwide.