@moira Starting on Dayton Ave N going south, you cross Westminster Way N using the crosswalk, take N 149th St east, turn right on Evanston Ave N, turn left on N 148th St, and follow that until it intersects with the Interurban Trail.
It's not very well marked, but there are wayfinding signs on Dayton Ave N just north of Westminster Way N and on Evanston Ave N just south of N 149th St indicating which way to go.
(Sorry for double post, I accidentally made a normal post instead of a reply.)