At 19 miles from the Cecil Moses Park to the North Green River Park in Kent, the Green River Trail follows it's namesake river through the industrial area near the Duwamish east into the broad Green River Valley, offering changing views along the way. From industrial south Seattle to the lusher Green River, the paved trail offers an interesting perspective of the city, as the view from the paved trail changes from urban to more rural.
The Green River Trail follows the Green River through industrial areas and office parks, then arrives at Fort Dent, where it joins up with the Interurban Trail. Near this junction, it's possible to see the old Black River (now dried up from the lowering of Lake Washington). In this area, look for abandoned bridge abutments and pilings from when flat bottomed boats routinely made the trip all the way up to the Black River.
The trail is perfect for walking, biking, and commuters. Eventually, the idea is to connect the Green River Gorge all the way to Flaming Geyser State Park. For now, it provides a nice way to get some exercise, and the opportunity to see wildlife and the landscape of this area.