Bill Williams Peak, elevation 13,389 feet (4,081 m), is an (officially unnamed) mountain located in Pitkin County, Colorado, United States.

The summit is located 12.2 miles (19.6 km) east of Aspen, Colorado, in the Hunter–Fryingpan Wilderness of White River National Forest.

In November 1848, John C. Fremont hired Williams to guide his ill-fated fourth expedition through the Southern Rocky Mountains.

[5] Williams led a rescue party south towards Taos, and the survivors of the expedition eventually managed to follow.

[6] In March, Williams and Dr. Benjamin Kern returned to the La Garita Mountains in hopes of finding more survivors.