One of the first readily apparent natural landmark within the Colorado River that you pass when rafting in Grand Canyon National Park is Ten Mile Rock. As the name implies, the rock sits in the river approximately ten miles from the start of the rafting trip at Lees Ferry and a few miles past Navajo Bridge.
It’s advisable to listen to your rafting guide carefully as he/she explains about Ten Mile Rock. Ours decided to test our listening skills, rational reasoning and gullibility by announcing that Ten Mile Rock had been flown in by National Park Service helicopter to mark the tenth mile of the Colorado River. While the rock does have a rather rectangular shape, it ended up at the ten mile mark through natural processes. Only a few on our boat realised that our guide was pulling our leg and several members were shocked when they found out the truth several days later. If nothing else, listening closely and questioning your guides will give you a good indication of the fun they will try to have during the trip and keep them honest.