Valley of Ten Thousand Smokes, Katmai National Park and Preserve

(4.5/5 based on 40+ reviews on the web)
The Valley of Ten Thousand Smokes is a valley within Katmai National Park and Preserve in Alaska which is filled with ash flow from the eruption of Novarupta on June 6–8, 1912. Following the eruption, thousands of fumaroles vented steam from the ash. Robert F. Griggs, who explored the volcano's aftermath for the National Geographic Society in 1916, gave the valley its name, saying that "the whole valley as far as the eye could reach was full of hundreds, no thousands—literally, tens of thousands—of smokes curling up from its fissured floor."The 1912 eruption was the largest eruption by volume in the 20th century, erupting about 13km3 of material. Novarupta generated as many as 14 major earthquakes with magnitudes between M6 and M7, a level of energy release virtually unprecedented during volcanic eruptions in modern memory, and over 100 earthquakes greater than M5. Following the eruption, the summit of Mount Katmai subsided (collapsed) about 1200m, forming the central caldera.Katmai is a stratovolcano, formed from alternating layers of lava flows and pyroclastic rocks. The presence of pyroclastic materials indicates that some Katmai eruptions have been explosive. The subsidence of the summit to form the central caldera and the extraordinarily energetic earthquakes accompanying the 1912 eruption are evidence of this.
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Reviews
TripAdvisor
  • The visit is made in a bus from which also had opportunity to see bears. The eruptions have left a spectacular landscape. The ranger was very friendly and everything you said was really interesting. Food, picnic type, correct and in a nice place.
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  • The amount of ash thrown out of the Katmai and Novarupta eruptions in 1912 is hard to fathom - it extends for many miles and is easily hundreds of feet thick. The trip on a 4-WD bus takes all day, and...  more »
  • I decided to go to the Valley of 10,000 Smokes as a day trip from Brooks Lodge at a cost of $96 (with lunch or $84 without lunch). I went on Sunday, Sept. 11, 2016. I knew in advance that there was an...  more »