From the terminus, the roadway turned north and crossed railroad tracks that are owned by the BNSF Railway and became Farm to Market Road.

[4] Once over the tracks, the highway passed the Skagit Regional Airport and intersected Josh Wilson Road, which travels west to Bay View.

SR 237 traveled over the Samish River and later entered Edison where it curved east as Mactaggart Avenue.

[5][6] In 1970, the intersection with SR 11 had a daily average of 1,410 motorists, making it the most used section of the roadway as a whole.

[7] In 1991, the busiest section moved south, before the intersection with Ovenell Road, the southern connector to Skagit Regional Airport, with a daily average of 2,300 motorists.