The town of Black Diamond and the surrounding region, including the park, is one of the main coal mining areas in Washington. The park's underlying coal seams provide the gas for the Flaming Geyser and the Bubbling Geyser. Interpretive displays located at the Flaming Geyser portray this relationship.
| | • Cedar
• Douglas Fir
• Hemlock
• Alder
• Apple
• Ash
• Cherry
• Maple
• Poplar
• Foxglove
• Paintbrush
• Rose
• Berries
• Ferns
• Moss or Lichens
• Thistle
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