Colorado

I am comparing mileage markers for Gore Canyon rapids to measurements I am making on Google Earth and finding significant discrepancies. The AW info lists Applesauce Rapid at 5.0 miles while my measurements say it is at 4.0 miles, and the markers for other rapids below Applesauce are also off, but not by the same amount.

Does anybody have any actual GPS waypoints for where each of these rapids begins so that correct measurements can be made?