Katmai National Park in Alaska by admin September 19, 2022 Katmai was first established as a National Monument in 1918, to protect the area surrounding Novarupta volcano, which formed the Valley of Ten Thousand Smokes with its pyroclastic flow after… Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)