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Elk Rock Island is an island on the Willamette River in the U.S. state of Oregon.[2] The 12- to 13-acre (4.9- to 5.3-ha) island, formed 40 million years ago by a volcano, was given to Portland by Peter Kerr in 1940.[3][4][5] The city of Milwaukie took ownership of the park in April 2016.[6] The island is accessible via Spring Park.

Elk Rock Island
The island in 2008
LocationMilwaukie, Oregon, U.S.
Coordinates45.436°N 122.648°W / 45.436; -122.648[1]
Created1955[citation needed]

Ecology


The island contains deciduous forest, mixed evergreen-deciduous forest and perennial graminoid vegetation.[7][8] It is one of the last stands of the Oregon White Oak.[9]


References


  1. "Elk Rock Island". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2010-12-14.
  2. Producer: Jim Newman (1999). "Elk Rock in Willamette River". Oregon Field Guide. Oregon Public Broadcasting. Archived from the original on March 19, 2012. Retrieved December 14, 2010.
  3. Saker, Anne (September 16, 2010). "Saving the oaks of Portland's Elk Rock Island". The Oregonian. Retrieved December 14, 2010.
  4. "Elk Rock Island". Portland Parks & Recreation. Retrieved December 14, 2010.
  5. "Friends of Elk Rock Island" (PDF). Portland Parks & Recreation. Retrieved December 14, 2010. Note: Brochure funded by City of Portland Bureau of Environmental Services and Portland Parks & Recreation in cooperation with the Friends of Elk Rock Island and the Island Station Neighborhood in the City of Milwaukie.
  6. "Elk Rock Island | City of Milwaukie Oregon Official Website". www.milwaukieoregon.gov. Retrieved Aug 19, 2019.
  7. "Site Survey: Elk Rock Island". Portland Parks & Recreation. Retrieved December 14, 2010.
  8. "Vegetation Unit Summaries for Elk Rock Island (ERI)". Portland Parks & Recreation. July 29, 2009. Retrieved December 14, 2010.
  9. Saker, Anne (Sep 17, 2010). "Saving the oaks of Portland's Elk Rock Island". oregonlive.com. Retrieved Aug 19, 2019.



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