Cathedral Peak is an mountain summit located in Okanogan County in Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades. The mountain is situated in the Pasayten Wilderness, on land administered by Okanogan National Forest. The nearest higher peak is Grimface Mountain, to the north in Cathedral Provincial Park in Canada. The Pacific Northwest Trail traverses below the south slope of Cathedral Peak as it crosses Cathedral Pass. Less than a mile to the opposite side of the pass stands Amphitheater Mountain. Precipitation runoff from Cathedral Peak drains west into Cathedral Fork, or east into Cathedral Creek.