Portland & Western Railroad - Unofficial fan site
Genesee & Wyoming - Official web site of corporate parent of the Portland & Western
Whyte Notation - Steam locomotive wheel arrangement classification

Whistle Stop Trains - 11724 SE Division St, Portland, OR 97266
The Hobby Smith - 1809 NE 39th Ave, Portland, OR 97212
Mainline Trains - 2707 Pacific Ave, Forest Grove, OR 97116
Tammie's Hobbies - 12024 SW Canyon Road, Beaverton, OR 97005
Hillsboro Hobby Shop - 345 East Main, Hillsboro, OR 97123

PdxHistory.com - Portland history, including streetcars and interurban lines
Abandoned and Active Historical Railroads - Lots of railroad info, including pictures, of lines around the Pacific Northwest
Pacific Northwest Traction History
Washington County Historical Society & Museum

National Model Railroad Association
Layout Design Special Interest Group

Oregon Electric Railway Historical Society - Operators of the Willamette Shore Trolley and a museum in Brooks, OR
Pacific Northwest Chapter of the NRHS
Oregon Rail Heritage Foundation
SP&S 700
Friends of SP 4449
Rose City Garden Railway Society

http://home.europa.com/~tjspears/Railroad/

QSI - Also at http://www.qsindustries.com/
Precision Craft Models
Woodland Scenics

<table border="0"> <tr><td><a href="http://www.aloharail.org"><img src="http://www.aloharail.org/images/logo.gif"></a></td> <td align="center"><a href="http://www.aloharail.org">The Aloha &amp; Western Oregon Lines<br>Model Railroad Club</a></td></tr> </table>

This will give you link that looks like this:

The Aloha & Western Oregon Lines Model Railroad Club