Sedro-Woolley, Washington
WA-20 East/WA-9 North at WA-9 North
WA-20 East/WA-9 North at WA-9 north to Sumas.
WA-20 East/WA-9 North
WA-20 East/WA-9 North in Sedro-Wooley.
WA-20 East at WA-9 South
WA-20 east at WA-9 south to Arlington. WA-9 joins WA-20 east through Sedro-Wooley.