I'm lazy and not fit. I'm the guy holding onto rocks hoping not to fall into cacti while watching runners breeze by as if on air, and wondering how they get their foot landings so perfectly balanced. For people like me, go slowly and steadily. Bring a lot of water. Wear sunscreen and make sure the sun and temperature are on your side. Plan 2-3 hours up and down. This is a hike/climb. No pain, no gain!