Height and length are both a challenge for separate reasons. Height is a challenge due to the logistics of getting there with the correct gear and planning for remote and harsh environments. Length is a challenge in terms of rigging complexity, physical ability, and the skill and conditioning needed as an athlete to perform the crossing safely. The rigging becomes more complex as the lines get longer, a lot more gear, knowledge and experience are needed once the line becomes longer. It’s not all about the challenge of crossing long and high lines though, the ‘king line’ of each crag is often not the highest or longest but the most beautiful and best feeling line that fits in with the natural landscape.