Whatcom Peak, Mountain summit in North Cascades National Park, Washington, US.

Whatcom Peak is a 7,574-foot (2,309 m) summit in North Cascades National Park, Washington, set between Mount Challenger and Easy Peak. The Whatcom Glacier descends from its northeast slopes, an unnamed hanging glacier drops along the northwest flank, and Challenger Glacier lies about 0.5 mi (0.8 km) to the south.

The peak lies in the North Cascades, built up from terranes — fragments of oceanic and continental lithosphere — assembled about 50 million years ago as the North American Plate overrode the Pacific Plate. Pleistocene glaciation, advancing and retreating repeatedly, scoured the landscape and left rock debris; uplift and faulting combined with ice to carve the tall peaks and deep valleys.

The name Whatcom comes from a Coast Salish word also used for the county and the nearby Whatcom Glacier, which drops from the peak's northeast slopes. The summit stands between Mount Challenger and Easy Peak, and the Challenger Glacier lies about 0.5 mi (0.8 km) to the south.

Reaching the summit requires advanced climbing skills since the routes involve technical sections. Visitors should be prepared to work in high alpine terrain with rough conditions and changeable weather.

Whatcom Peak sits just 0.5 mi (0.8 km) north of Challenger Glacier, and its own Whatcom Glacier drops from the northeast slopes; an unnamed hanging glacier descends the northwest flank. The mountain stands between Mount Challenger and Easy Peak.