Best Cascades
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Mount St. Helens fumaroles are gas-emitting vents located within the crater of this Washington, USA volcano, which famously cataclysmically erupted in 1980.
Lassen Peak summit fumaroles are superheated gas vents in California, USA, notable for their prominence following the volcano's major 1915 eruption.
Mount Rainier fumaroles in Washington, USA, are located at the summit craters and create extensive summit ice caves by melting the overlying glacial ice.
The Mount Baker fumaroles in Washington, USA, are notably concentrated in Sherman Crater, which experienced a massive increase in heat output in 1975.
Mount Shasta fumaroles are weak gas vents located near the summit hot springs of this California, USA stratovolcano, indicating persistent underlying heat.
Mount Hood fumaroles in Oregon, USA, are actively degassing sulfur-rich vents near Crater Rock, highlighting this stratovolcano's ongoing geothermal activity.
