Flat, easy trail. We averaged over 3 miles an hour. Great views. Looking forward to biking it in the spring - all the way to Concrete for lunch, then back. Trail was flooded about 5 miles in due to recent rains in the mountains. We had to turn around because it was cold (30 degrees) so we did not want to get our feet wet. The GPS and directions got us lost. Spent a half hour searching for the trailhead in a completely wrong place. One trailhead and parking area is just south of hwy 20 on Township . The other is at the intersection of hwy 20 and Fruitdale.
This is a great bike trail that runs from Sedro-Wooley to Concrete, Washington. It has very light use. It runs along the SR-20 with epic views of the nearby mountain ranges, Skagit River, a winery, etc. with elk and eagle viewing sites along the way. A really fun ride. Much more preferable to competing with the traffic on the SR-20. Leashed dogs are allowed as well.