There is also the sound of the river as it moves north through the city. The occasional rapids change both the color and the sound.
I pass a lot of bikers, joggers, walkers and people just sitting and enjoying the river and its environs. It's nice to greet these people as I ride by. The mostly deciduous trees change from bare to green to yellow through the year.
Before I leave the path I cross the river at the Owasso Bridge, a pedestrian-bike bridge that connects the east side path with the west side. There seems to always be at least one person on the bridge watching the river rush by, sipping coffee or eating a snack. More often than not there are several people there occupying the benches.
If I need to, the Willamette River bike paths can take me all the way into Eugene after a 1/2 mile ride on the streets. The river flows south to north and cuts Eugene in half. The bike paths are well-maintained and for the most part safe.