I was out #biking and saw a few "Burke Gilman - Interurban Trail interconnect" signs and ended up chasing them down. The southern ones are horrible, the northern ones are similar to how I used to bike to Shoreline Community College for school.
Anyway one thing lead to another and I think this is the least likely to kill you route from Lake Forest Park Town Centre to Alderwood Mall, in case for gods only know what reason you wanted to go there. But as a subset of that, it's also the least bad Burke Gilman<->Interurban (North) connection.