We love this climb
http://www.mapmyride.com/routes/view/16737731
We do it on our 30-32 we actually like to go about 300ft higher to the salt shed.
We have to stop five times on the descent to let the rims and brakes cool down. There is a short section of 18%(according to the sign anyway).
Some people like the Pemberton to Lilooet and back but we have not had time yet.