Mallard Creek, Mallard Lake, and the Upper Geyser Basin (Old Faithful)

The Upper Geyser Basin in Yellowstone National Park contains the most famous hydrothermal feature in the park, Old Faithful. Surrounding this iconic geyser are a vast array of spring, pools, and geysers. I hiked up from Mallard Creek to nearby Mallard Lake, then dropped down to the basin and explored around, including a visit to[…]