DUVALL Washington Watercolor Wash Topo Map: PRINTDUVALL, Washington. Nestled against the Snoqualmie River and the western edge of the North Cascades in the Snoqualmie Valley, Duvall's charm is natural. The ranges are drawn by hand in hachure lines. This is a PRINT. My hand drawn map lines are turned white over a watercolor wash textural painting in tones of salmon, undertones of terracotta. Epson archival coated paper Epson Professional high quality inkjet printer Archival inks. Color may be