My older teenager and I tackled the course in about four and half hours. We had a blast! The course begins with a safety briefing and overview on how the system works. You go through a brief orientation climb (<10 feet off the ground) with a mini-zip line before being released to start the "green" climb. There are five sections going from easiest (green) to most challenging (black). Within each climb, the obstacles get a bit more difficult, and as each section progresses, there is an increase in difficulty. Generally the more you progress, the higher you go, and the more wobbly the obstacles become. You can stop at any point, and if you're in a tree or on an obstacle, guides will climb up and lower you to the ground (but you are done at that point - you may not return to the course). If you have never had climbing or ropes course experience, the green, silver, and blue courses are fine for you, but you may struggle on the red and black courses (or you may surprise yourself and excel!). There are multiple zip lines within each course, as well as a variety of challenging obstacles. It is generally easier the taller you are and the better your upper body strength, but shorter people with less strong upper bodies still can do the course and can still have a great time. There was a small group of women (approximately 55 - 60 years old) ahead of us, and two of them admitted to being petrified of heights. They did great! they challenged and supported each other, and completed the green, silver, and blue courses. One of them made it about half way through the red course too! All in all, we had an absolute blast, and we will return to do it again next year! One piece of advice: Driving up from Phoenix and doing the course on the same day may out you at a disadvantage respiratory-wise due to the altitude (approximately 7,000 feet). If you can spend a day in Flagstaff to acclimate before climbing, that would probably be better, but it isn't absolutely necessary.