Henry D. Washburn

Events

1

Episodes

1

Years

1870

Every event in Historedia whose sources name Henry D. Washburn, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

1. Washburn–Langford–Doane Expedition names Old Faithful in Yellowstone

   1870

   Role: Expedition Leader

   1. 1September 18–19, 1870 (approximate) · Upper Geyser BasinNaming Old Faithful Geyser

      The expedition named Old Faithful after observing its regular eruptions in the Upper Geyser Basin, noting a frequency of about 74 minutes.

Sources

1. Yellowstone National Park Wikipedia, revision of 2026-10-06
2. Washburn–Langford–Doane Expedition Wikipedia, revision of 2025-09-18