Hardest challenge from my bow weekend was this rock climbing wall which stands at 35 ft and sports a zip line, top left. Closer I got to the top my arms became jelly, my heart raced and I was tired. Still... I climbed on. When I made it to the top platform I changed out ropes so I could purchase open air on the zip line. The whole experience was AweSome.What's been your hardest challenge outdoors?