Headed for the Mountains
Join Date: Jun 2011
Location: Mission, BC, Canada.
Interest: Borrowing or lending?
You can't officially ride up the service roads. There is a possibility to ride up the microwave road from function junction, then connect to whistler via the Khyber Pass trail, but I haven't done it, so can't comment on difficulty.
I know riding up as far as midstation is a LOT of work, the peak is a lot more elevation.
I assume WB doesn't want riders going up as there could be collisions between high speed downhillers and slow uphill traffic. Or they just want the money.