Nooksack was selected in Washington from a cross of Kennebec x A501-13. Nooksack is late maturing and produces a medium to high yield of tubers with good appearance and excellent quality. It is well suited for frozen French fry production but can also be used in the fresh market. Plants are large, upright to spreading. Stems are few and large with inconspicuous wings and slightly swollen nodes.
Leaves are very large and dark green.
Young leaves often have merged leaflets. Flowers are sparse and borne on very short peduncles. Buds are green, corollas medium-sized and white, anthers large and orange. Tubers are oblong to long and flattened. Skin is heavily and uniformly russeted.