Grove Field, Camas, WA (1W1)
Correctly identified first by Paul Anton

A sweet little strip tucked in amongst the trees and residences of a Vancouver, Washington suburb. It sits just outside the more congested and complicated airspace where Portland International (PDX), Portland Troutdale, Vancouver Pearson (VUO) and Evergreen Field (59S) all merge. It does sit below Portland's class Charlie ring, but is a relatively easy airport to find.