Categories October Surprise 2016 Old Faithful | Yellowstone National Park, Wyoming, Map, & Facts … Post author By Mike Nova Post date January 18, 2026 Old Faithful, geyser, northwestern Wyoming, U.S., located at the head of the Upper Geyser Basin in Yellowstone National Park. Old Faithful is the most famous, though not the highest, of all North American geysers. ← Michele Steele on IU’s football fairytale, Super Bowl predictions → Flames trade D Rasmus Andersson to Golden Knights