Orbx have just announced the immediate availability of a free evaluation version of its FTX Pacific Northwest terrain. This is fantastic news. Go to the following link to find out more.
Here are the early-release links for the PNW Demo installer for P3D:
Canada : http://ftxcanada.com/dl/orbx/P3D_FTX_NAPNWDEMO_200.zip
Australia 1 : http://ftx-cdn.asia/dl/orbx/P3D_FTX_NAPNWDEMO_200.zip
UK : http://flightsimstore-europe.co.uk/dl/orbx/P3D_FTX_NAPNWDEMO_200.zip
America : http://fss-cdn.com/dl/orbx/P3D_FTX_NAPNWDEMO_200.zip
Germany : http://euro-fss-cdn.com/dl/orbx/P3D_FTX_NAPNWDEMO_200.zip
I really recommend you try it out!