Jacob told me about the trails. I chose North Kiabab. He said is was the hardest. I only hiked about 2 miles of it. It's the trail people take to hike Rim to Rim, from the North Rim to the South or vice versa. It's 14 miles from the top of the North Rim to the bottom of the canyon. There's no way, not in one day anyway. Hiking up is so hard.