Enjoy one of the longest paved trails in the Portland area for a quick escape from city street running.
Springwater Corridor is a 40-mile paved trail that stretches from downtown Portland all the way to Boring. This trail is wide, virtually flat, and yes, paved - but there is a clear manmade path on the dirt shoulders that's friendlier to knees. Any given day, you'll see dozens of cyclists and pedestrians on their daily commute or enjoying a break from the road.
The starting point for this adventure shows the Sellwood Riverfront Park Trailhead, though there's a second entry point right downtown at SE Market Water Ave. For simplicity's sakes, this adventure describes the distance from our first starting point to the second entry on Market Water. Simply follow the trail, following signs to stay on Springwater past Oaks Park, Oaks Bottom Wildlife Refuge, and along the Willamette River.
I'll be honest; this isn't the most scenic trail in the Portland area, especially since it weaves in and out of traffic with frequent street crossings. However, its easy access and extensive length makes it a great training trial for long run days.
Check out this official Springwater Corridor Trail Map from the City of Portland so you can start planning your trip.