“The folks at Metro make it easy to go on urban treks with their indispensable “Walk There!” guide, which has 50 walks throughout the area, including a number that are so obscure that even residents might not know about them.
The guide comes in a handy 4 1/2-by-6-inch size — perfect for sliding into the side pocket of your cargo shorts — and is a bargain at $9.95 at area bookstores. Even better, Metro has the maps and detailed walk descriptions available online, making it a cinch to download and print maps to guide you to your newest urban adventure. ”
http://www.oregonlive.com/entertainment/index.ssf/2010/08/10_enticing_urban_walkabouts_h.html
Note: the small maps used in the Oregonian article are not the detailed ones in the book–apparently the newspaper wanted simplified versions as thumbnails for the story.