Yellowstone National Park
Yellowstone National Park has one of the world's largest petrified forests, trees which were long ago buried by ash and soil and transformed from wood to mineral materials. This ash and other volcanic debris are believed to have come from the park area itself as the central part of Yellowstone is the massive caldera of a supervolcano. The park contains 290 waterfalls of at least , the highest being the Lower Falls of the Yellowstone River at .
Angling in Yellowstone National Park
Probably the most dramatic example of this is the Firehole River above Firehole Falls. When the Washburn-Langford-Doane Expedition camped on the shores of the upper Firehole in the fall of 1870, the river was barren of trout. The same was true of the Gibbon River and Gibbon Falls. Today, the upper Firehole is one of the premier angling destinations in North America.
One of the earliest accounts of trout fishing in the park is from Mary Trowbridge Townsend's 1897 article in Outing Magazine "A Woman's Trout Fishing in Yellowstone Park" in which she talks about catching the Von Behr trout in the Fire Hole "[sic]" river.