Griggs (top left) is a Holocene stratovolcano. Griggs has not erupted in historical time. The Valley of Ten Thousand Smokes is in the foreground. Griggs sits 6 miles (10 km) back from the main line of volcanoes the define the Aleutian arc in Katmai National Park. Photo by Jay Robinson, National Park Service.
Near the summit of Griggs. Mageik and Martin volcanoes are in the background. Photo by Jay Robinson, National Park Service.
Although Griggs has not erupted in historical time there are active fumaroles near the summit of the volcano. The roar from the gas as it shots from these vents can be heard on the valley floor. Photo by Jay Robinson, National Park Service.
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