It used to cross the country. Time has eroded it and now it is just patches and pieces mostly in the western states.

Some of still is quite nostalgic though. It's definitely worth a drive particularly in Oklahoma and Arizona.

Yup, That's the corner in Winslow Arizona. I, of course had to stop and get a picture of me Standin' on the Corner

Route 66: EZ66 GUIDE For Travelers - 4TH EDITION

Although over 80% of original Route 66 is still easily drivable, it is not on ordinary maps and signage is spotty. The EZ66 GUIDE For Travelers is the answer to finding the Route. The 4th Edition EZ66 GUIDE For Travelers has many pages updated. This is the ultimate guide for finding and exploring the Route whether you're driving from the WEST or the EAST. Its maps and directions are comprehensive yet easy to follow. The spiral bound guide stays open to the pages you are reading while you are driving or riding. Also includes attractions, tips, other sources, and games. Convenient 5 1/2" x 8 1/2", 216 pages