The Flaming Geyser State Park is located on the Green River in southwestern King County, Washington, near the city of Black Diamond.

When the pocket was discovered by prospective coal miners in the early 1900s, the test hole hit gas and saltwater, shooting water and flames 25 feet (10 m) into the air.

[6] Urban legend of the park's history describes how miner Eugene Lawson aimed to profit from the ignited methane emission.

This conservation area covers 2,008.02 acres (8 km2) and 18 miles (29 km) of river shoreline bordered by Flaming Geyser to the west and Kanaskat-Palmer State Park to the east.

[5] The Green River is a popular steelheading location in the winter, and an ADA-accessible Salmon Interpretative Trail in the park explains more about this ecological relationship.