My family and I are in Hawaii for 2 weeks and we had always made plans to visit the Visitor Center on Mauna Kea at 9200 feet. But a lot of people were hiking up to a hill, another 1,000 feet. My 24 year old son said lets go dad!!! He had no issues, I knew I couldn't do it with all my gear. So I grabbed my Canon 1DX mk II and Canon 16-35 2.8 III and headed up. So glad we did. Great view, great time with my son. So happy!!! Both of us!!!