Pink Cone Geyser, Cone geyser in Lower Geyser Basin, Yellowstone National Park, Wyoming, US

Pink Cone Geyser is a cone geyser in Lower Geyser Basin, Yellowstone National Park, distinguished by its pink and reddish coloration. The color comes from manganese and iron oxide deposits that have accumulated on the siliceous sinter cone over time.

Pink Cone Geyser was named by the Hayden Survey. Its siliceous sinter cone is dark pinkish-red, a colour attributed to manganese oxide and iron oxide staining. The same colouring appears at nearby Pink Geyser and Narcissus Geyser, indicating a common water chemistry, though their behaviours do not affect each other.

The name comes from the Hayden Survey, and the pinkish-red tint of the siliceous sinter cone is attributed to manganese oxide and iron oxide staining. The same coloration appears at nearby Pink Geyser and Narcissus Geyser, which points to a common water chemistry, though the geysers' behaviours do not affect each other.

Eruptions last 1.5 to 2 hours and reach a maximum height of 30 feet (9.1 m). The interval between eruptions is 18 to 25 hours, so timing a visit means checking the latest prediction rather than waiting on site. The geyser sits in the Lower Geyser Basin, within the Pink Cone Group alongside Bead, Dilemma, Labial and Narcissus geysers.

The pinkish-red tint of the siliceous sinter cone comes from manganese oxide and iron oxide staining. Pink Geyser and Narcissus Geyser nearby show similar coloration, which points to a shared water chemistry, though the sources note their eruptions do not affect each other.