Pleasant Ridge is a glacially deposited promontory rising above the flat Skagit River delta — an elevated sanctuary above seasonal floods that made it one of the most sought-after settlement sites in early Skagit County. The first Euro-American settlers, Samuel Calhoun and Michael Sullivan, arrived in 1863. By 1871, Sullivan's barley harvest from diked wetland sold for $1,600 at the river bank — a figure that electrified the region and brought a wave of homesteaders to the ridge.

The Leamer family arrived in the early 1870s, and with them came a fierce commitment to education. In July 1872 — just nine years after the first settlers — fifteen-year-old Ida Leamer opened the first school on the ridge in her family's home. She earned the first teacher's certificate ever issued within the present boundaries of Skagit County.

By 1891, the community had outgrown its log schoolhouse. The new two-room schoolhouse — the building standing today — was constructed on Leamer-donated land and opened with Mary E. Chilberg as its first teacher. For the next four decades it was the educational and social heart of Pleasant Ridge: spelling bees, debates, Christmas pageants, and community meetings all unfolded within its walls.