Maple Valley is a city in King County, Washington, United States. The population was 22,684 at the 2010 census. The population was 25,686 at the 2015 estimate.

The area was settled in 1879 by three men who were improving a trail and brought their families in. When a name for a future community was proposed, the names Vine Maple Valley and Maple Ridge were suggested. A vote was taken by writing the names on slips of paper and placing them in a hat. Vine Maple Valley won by 2/3, but the word "Vine" was later cut by the post office because it made the name too long.

The town's early history mainly had to do with coal, lumber milling to build homes, and a railroad which ran through town. Coal was brought in from Black Diamond to the south, but the town itself also mined coal from Cedar Mountain. The mine was used as late as 1947. Rail workers for lines like the Northern Pacific Railroad and the Cedar River Watershed, closed off by the City of Seattle, meant more workers for those things. More residents meant more lumber milling. More lumber milling meant more workers. Suquamish tribe chairperson Martha George was born near Maple Valley in Sheridan in 1892, at a logging camp where her mother and grandmother worked as cooks."

The town grew inward. Blacksmith shops, hotels, saloons and stores took up the town in the 1910s and 1920s. Schools went up as well. Early schools were shacks at best. A two-room school went up in 1910, but a larger school was quickly needed. Tahoma High School, a three-story brick building, went up in 1920. Students made up the name by combining the first two letters in the town names Taylor, Hobart and Maple Valley. The school still serves the Tahoma School District as a middle school.

More residents meant farming and fishing became staples in the area, with milk, poultry and berry farming becoming the main grown food staples in the area. Fishing out of the Cedar River also became popular.

Maple Valley also saw resorts beginning in the 1920s. Lake Wilderness, once the site of a county lumber mill, quickly became a resort lake with the opening of Gaffney's Grove, which opened with a ballroom, restaurant and roller rink. Later, the resort grew to include an airstrip, lodge, rental cabins, a nine-hole golf course and a bowling alley. It remained in operation until 1964.

...
Wikipedia