Ash Island, River island in Willamette River, Yamhill County, Oregon.
Ash Island is a river island in the Willamette River spanning about 137 acres with sandy fields and wooded shorelines along the water. The terrain includes both open grassland areas and forest sections that border the river channel.
A water level monitoring station operated by the National Oceanic and Atmospheric Administration was established on the island starting in 1950. This station has continuously tracked river water conditions since its installation on the site.
The island operates as active farmland where agricultural work continues throughout the year alongside natural habitats for native wildlife. Daily farming activities shape how the landscape looks and functions for both people and animals.
Reaching the island requires boat access from nearby river landings, as there is no bridge or road connection to the mainland. Visitors should plan to arrange transportation by water and respect any private property boundaries on the site.
A wooden dam at the southern end of the channel creates distinct water flow patterns around the island that shape how the river moves past the site. This structure demonstrates how human engineering alters the natural currents and behavior of the waterway.
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