Located in the Willamette River just upstream from West Linn, Little Rock Island hosts a diversity of plant communities including one of Oregon's rarest, the white rock larkspur. Small channels separate segments of the island, which is forested on the north but open and rocky on the south. The multitude of habitats on the island support equally diverse bird populations.
On the Willamette River, upstream from West Linn, in Northwest Oregon
The 12-acre preserve includes the island, a gift from James River Corporation. Twenty acres on the west riverbank are cooperatively managed by the Conservancy with the Oregon Parks and Recreation Department and the Metro Parks and Greenspaces Program.
Ecologists are monitoring the populations of white rock larkspur, while volunteers are employed to eradicate invasive Scots broom and Himalayan blackberry.
While the preserve's "star plant" is undoubtedly the rare white rock larkspur, other vegetation includes beautiful madrone and plants more typically found in arid environments, such as desert parsleys.
While visiting the preserve, keep your eyes and ears alert for osprey and various songbirds.
The island and adjacent shoreline are for day use only. Please watch for poison oak.
Please observe the following guidelines while hiking:
The preserve is reachable only by watercraft. The city of West Linn's Willamette Falls Park has boat launch facilities.