Windom Peak, Mountain summit in Chicago Basin, La Plata County, United States.

Windom Peak is a mountain summit in the San Juan Mountains of La Plata County, Colorado, reaching about 14,087 feet (4,293 m). It sits inside Chicago Basin, a remote glacially carved bowl ringed by steep granite walls and open rocky slopes near the top.

Windom Peak was named in honor of Minnesota senator William Windom, not by survey expeditions. The name Windom Mountain was later changed to Windom Peak in 1974. The peak is the highest point in La Plata County and the San Juan River drainage basin.

The mountain honours Minnesota senator William Windom, who served as a U.S. senator and later as Secretary of the Treasury. The name was formally recorded as Windom Peak in 1974, after earlier use of Windom Mountain. The peak lies on the east side of Twin Lakes in upper Chicago Basin, opposite Mount Eolus.

The standard route is rated class 2, so no rope is normally needed, but the upper section crosses talus and requires careful route-finding. Windom shares upper Chicago Basin with Mount Eolus and Sunlight Peak, and the approach from the Needleton train stop is long, so plan a full day and start early to avoid afternoon storms.

Windom Peak is one of three fourteeners in the Needle Mountains, along with Mount Eolus and Sunlight Peak. Windom and Sunlight stand on the east side of Twin Lakes in upper Chicago Basin, while Eolus lies on the west side. The standard route up Windom is rated class 2.