Bunsen Peak, Mountain summit in Yellowstone National Park, Wyoming, US.

Bunsen Peak is a mountain summit in Yellowstone at an elevation of 8,564 feet that rises sharply above Mammoth Hot Springs. It has steep slopes with exposed rock and offers unobstructed views from the top toward the Gardner River valley and neighboring peaks.

Ferdinand V. Hayden and Captain John W. Barlow made the first recorded ascent in 1871. The peak was named the following year, 1872, during the second Hayden Geologic Survey. In that same year E. S. Topping tried the name Observation Mountain, which did not last.

The name honours Robert Bunsen, the German chemist who invented the Bunsen burner and worked on theories of volcanic geysers. Before that, E. S. Topping proposed "Observation Mountain" in 1872, a name that did not last. The peak was named during the second Hayden Geologic Survey.

The route to the summit starts south of Mammoth and goes about 2.1 miles uphill through varied terrain. Sturdy footwear and some scrambling experience help, as the trail can be exposed and slippery in wet weather.

Bunsen Peak was first climbed in 1871 by Ferdinand V. Hayden and Captain John W. Barlow, before it had a name. During the second Hayden Geologic Survey in 1872 it was named for Robert Bunsen, the German chemist who invented the Bunsen burner and worked on theories of volcanic geysers. E. S. Topping proposed Observation Mountain that same year, but the name did not last.