On September 18, 1870, the members of the Washburn-Langford-Doane Expedition traveled down the Firehole River from the Kepler Cascades and entered the Upper Geyser Basin in what is now Yellowstone National Park. The first geyser they saw was Old Faithful. Nathaniel P. Langford wrote: “It spouted at regular intervals nine times during our stay, the columns of boiling water being thrown from ninety to one hundred and twenty-five feet at each discharge, which lasted from fifteen to twenty minutes. We gave it the name of "Old Faithful."
Old Faithful has lived up to its name, only lengthening the time between eruptions by about 30 minutes in the last 30 years. Eruptions normally last between 1½ to 5 minutes and expel from 3,700 gallons to 8,400 gallons of water. At the vent, water is 203ºF (95.6ºC). Today, visitors can watch eruptions from the Old Faithful viewing area or along the boardwalks that weave around the geyser and through the Upper Geyser Basin. Learn more at https://www.nps.gov/ye…/planyourvisit/exploreoldfaithful.htm
Image: "Kissing" steam clouds of Old Faithful. Photo/Bob Dunne