Welcome from a former Texan. Those are nice rides recommended above, but if you want to see the city, I'd first recommend a ride along Waterfront Park, over the Steel or Hawthorne bridges to the Eastbank Esplanade and down the Springwater corridor, then a leisurely cruise through SE Portland, maybe checking out Laurelhurst Park, Mt. Tabor, etc. Then back over a different bridge to downtown. (Or reverse directions if you start on the east side.) There's really too many wonderful city rides to list here, so don't try to do everything in three hours! You can also rent at Waterfront bikes, and any of the places you rent from will have some suggested routes and maps, or you can check here: http://www.portlandonline.com/transp...=71971&c=34812
. Enjoy Portland, and be sure to drink a microbrew at one of our bike friendly brew pubs after your ride.