Little Jack is a 6,745 ft summit in the North Cascades Range of Washington, United States. It is located within the Pasayten Wilderness. It is situated one mile south of its namesake Jack Mountain, west of Crater Mountain, and east of Ross Lake. Like many North Cascade peaks, Little Jack is more notable for its large, steep rise above local terrain than for its absolute elevation. In the early 1900s, the Forest Service built the Little Jack Trail for the purpose of grazing pack animals on the meadows of Little Jack Mountain. The name Jack honors Jack Rowley, a gold prospector in the area during the late 1800s, who was credited with finding gold at Ruby Creek.