Are there any unofficial VFR transitions through Portland Class C airspace besides the "Northbank Transition" from Vancouver-Pearson east? Sometimes I use quite a bit more radio time then I need to when asking for a transition, I think it would be more efficient to ask for "XYZ" transition instead my long explanation. Keep them controllers from getting wondering WTF.
Specifically crossing over from the west hills to sandy or overflying the willamette/downtown north-south above the Class C floor.
Thanks,
-Matt