Use the link below to access the Oregon State Parks Willamette River Guide Maps of the Willamette River. The West Linn map is located on page 28.
Also, NOAA's BookletChartTM is available using the link below. The BookletChart contains all the information of full-scale nautical charts, but divided into pages for convenience. The Willamette River for West Linn is shown on pages 7, 11, 14, and 15.