Probably not-
Nevertheless, an Oregon paper asked the question.
Trouble is there is no grizzly bear corridor into Oregon. Grizzlies would first have to fill up central Idaho where there are probably none.
There have been sightings of “grizzlies” for years in NE Oregon, but not one verified.
Moose enter Oregon, so are grizzlies next? By Richard Cockle, The Oregonian
Ralph Maughan
Dr. Ralph Maughan is professor emeritus of political science at Idaho State University. He was a Western Watersheds Project Board Member off and on for many years, and was also its President for several years. For a long time he produced Ralph Maughan's Wolf Report. He was a founder of the Greater Yellowstone Coalition. He and Jackie Johnson Maughan wrote three editions of "Hiking Idaho." He also wrote "Beyond the Tetons" and "Backpacking Wyoming's Teton and Washakie Wilderness." He created and is the administrator of The Wildlife News.
“”But some biologists argue that grizzlies have no way of knowing that Oregon’s moose are here.””
They need cell phones.