IIRC from looking at a brochure for that tour recently, it starts at the trail at Paulina Falls and then the trail follows the creek down stream where the slides, other falls, and pools are. Not positive but this is what it looked like. It's about 6 miles and easy tread from the pics as a Trail-A-Bike is pictured in one shot.
Heres a link to more info that might help. http://toddvdz.powweb.com/home.html
Heres a link to more info that might help. http://toddvdz.powweb.com/home.html