Downtown and Northwest Professional Review and Guide
"Downtown Portland is bike-friendly, with generally low traffic speeds and adequate bike lanes. Still, it’s a bustling place with the usual urban hazards: unpredictable pedestrians, distracted drivers, car doors flying open, and light rail and streetcar tracks waiting to eat your front wheel. Don’t fear; just be alert and ride with caution.
The ride visits downtown, the Pearl District, Northwest Portland, and Old Town. It follows streets with bike lanes and/or low traffic—but you can, of course, make your own route. The street grid makes it easy to find your way."