Recently our 15 year old daughter was able to experience GO APE! with a group of other homeschool students. It was a challenge at times in the obstacle course but she continued to the very end. There are about 40 different challenges in 5 station areas and each one ends with a Zip Line and each one takes you higher and higher into the "forest". You receive good instruction before you start and they are available throughout your course to help in anyway. You definitely need more upper body strength to do this than you realize! Good challenge and good work-out... my daughter was tired but had a huge smile on her face and is ready to go back again!!! From beginning to end it took about 3 hours. Plan enough time so you aren't feeling "rushed" to get through it. For those not doing the course you can view from below so you can see what they are doing and get pictures or video.