Hall Peak is a 5,484-foot (1,672-metre) mountain summit located in the South Fork Stillaguamish River Valley near the western edge of the North Cascades, in Snohomish County of Washington state.

[3] It is located 5 miles (8.0 km) northwest of Barlow Pass along the Mountain Loop Highway, near the Monte Cristo area, on land administered by the Mount Baker-Snoqualmie National Forest.

Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to the various climate differences.

[6] During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris.

Uplift and faulting in combination with glaciation have been the dominant processes which have created the tall peaks and deep valleys of the North Cascades area.