A number of websites are reporting that this street view image is of a clandestine high-altitude road test featuring a fleet of new Porsches. The images were taken near the end of Mount Evans Road, Idaho Spring, Colorado.
Secret Porsche road test in progress
Rene73
@ 2009-01-02 11:16:18
That's not "new"Porsche - is a Porsche Cayman (built for2005)
Anonymous
@ 2009-01-02 11:53:32
They don't look like "new" models to me, but that doesn't mean they aren't "testing high-altitude gizmos." Probably just a Car Nut Club.
neotrix
@ 2009-01-11 10:14:50
http://www.spiegel.de/auto/aktuell/0,1518,599750,00.html