North Cascades Ruggedness pictures

Large version of North Cascades: area = 27300 km^2, rug = 135m.
Top left is Fraser River Valley; bottom is Snoqualmie Pass area.

Medium version of North Cascades: area = 20000 km^2, rug = 149m

Small version of North Cascades: area = 9100 km^2, rug = 172m.
Main part goes South to around Glacier Peak, Lake Chelan. Southern outlier is Mount Stuart area.