Centennial Trail Professional Review and Guide
"This is a ?at, relaxing ride, mostly in the country, on a trail that’s been much expanded recently to create a great link between the towns of Snohomish, Lake Stevens, and Arlington.
If you start your tour in Snohomish and loop the entire distance, you’ll put in 65 miles (a “metric century” in cycling lingo), which is quite a challenge for many people, even on a ?at trail. But the nice thing about this linear rail-trail is that you can pick it up from various trailheads and just ride a section or two, based on your available time and energy level. There are toilets (but not water) at all the trailheads."