Beehive Geyser, Geyser in Upper Geyser Basin, Yellowstone National Park, US

Beehive Geyser is a geyser in the Upper Geyser Basin of Yellowstone National Park. Its rough, pale grey cone rises about 4 feet (1.2 m) and resembles a straw beehive. Eruptions send a column of water and steam about 200 feet (61 m) straight up for roughly five minutes, often with a rainbow in the mist.

On September 18, 1870, the Washburn-Langford-Doane Expedition entered the Upper Geyser Basin and named seven erupting geysers, including this one. Nathaniel P. Langford described a siliceous cone three feet high and five feet across, with an oval orifice 24 by 36.5 inches; the party named it "The Beehive" after the cone's resemblance to a straw beehive.

The name comes from the Washburn-Langford-Doane Expedition of 1870, whose members thought the 1.2-metre cone looked like a straw beehive. Langford recorded an eruption of 219 feet lasting eighteen minutes. Visitors today watch for Beehive's Indicator, a small jagged cone about 3 metres away that usually plays 15 to 20 minutes before the main eruption.

Beehive's Indicator, a small jagged cone about 10 feet (3 m) away, usually starts playing 15 to 20 minutes before Beehive erupts, so watch it to time your wait. Eruptions last about 5 minutes and reach roughly 200 feet (61 m); intervals run from under 10 hours to over a day, and in summer 2009 they came every 11 to 14 hours. Beehive and its Indicator can also be watched on the Old Faithful webcam.

Beehive's Indicator, a jagged cone about 10 feet (3 m) from Beehive, usually plays 15 to 20 minutes before the main eruption, though Beehive can erupt without it. During a three-year dormancy in the 1990s, the Indicator erupted for up to 60 minutes with no Beehive eruption following.