The way points of this bicycle route:
From Shoreline to Everett you can ride the Interurban (which at this point is still not complete), but 99 is faster. Do it at noncommute time to avoid the worst of the traffic.
At this point you can take the on ramp and ride over the bridge with traffic or you can turn left into a small drive that leads to pedestrian walkway the crosses over the northbound bridge.
On your left is a public restroom that provides a good opportunity to get some water and leave some behind.
You made it! Stop at the Coop deli and have a muffin.