Sauk Mountain is a 5,545-foot summit in Washington's North Cascades, north of Rockport State Park and the North Cascades Highway on Mount Baker-Snoqualmie National Forest land. Rising above the confluence of the Sauk and Skagit rivers, it takes its English name from the Sauk River, itself named for the Sauk people, and is known in Lushootseed as dxʷgʷiʔt. A popular two-mile trail reaches its craggy summit, which offers wide views of major nearby peaks. The mountain also reflects the broader North Cascades landscape, shaped by Pacific-driven marine climate, heavy winter precipitation, and long geologic forces including uplift, faulting, volcanism, and repeated glaciation.