Bryan Gates asked about turkey vulture migration on the Olympic Peninsula (what
happens to the birds once they leave Victoria):

I hesitate to offer my two-cents worth to the turkey vulture discussion because
it is not much more than anecdotal but I guess enough anecdotal evidence could
start to show a pattern...

A year ago my wife and I moved from a home in Port Angeles to one on an
east-west ridge in the foothills above town (Port Angeles) and since then I
have been more aware of the turkey vultures moving through the area. Last fall
around this time of the year and over the past couple of weeks, we have
observed turkey vultures (mostly individuals and small groups of 3-5) cruising
along the ridge from west to east. Perhaps these birds have lost most of their
altitude during the crossing (of the Strait of Juan de Fuca) and are riding the
prevailing winds east (without gaining much altitude) until they can turn south
around the Olympic Mountains. Their other 'choices' would be to catch a
thermal on the north slope of the Olympics before crossing the mountains (A
thermal this time of the year? Not much hope there!) or turn west into the
prevailing winds (and into generally crummy weather) to the coast then fly
south down the coast to avoid the mountains.

It could also be that the birds hit land west of town and go east and/or west
(depending on conditions) and I only see the ones going over my place --
heading east). However, my bet is on the eastern route around the mountains.

Roger_Hoffman at nps.gov
Olympic National Park
Port Angeles, WA. USA