This is not the official website of this parish.
SR-503 is 117th Ave in Vancouver then becomes 122nd Ave in Battle Ground>
They have their own local street names.
NE 219th St is Main St.
NE 229th St. corresponds to 8th St., etc.
NE 122nd Ave. is 503.
NE 132nd Ave. is Parkway Ave.
NE 142nd corresponds to Grace Ave.
Main St. separates North and South Battle Ground.
Parkway Ave separates West and East Battle Ground.
By the way on my map Hawthorn is spelled without an E at the end.