The states of California and Oregon were the westernmost states in the Union during the US Civil War.
California and Oregon but there are more states
the Oregon and The Mormon Trails.
Oregon and Washington
The United States and Great Britain shared the Oregon Country from October 20, 1818 until June 18, 1846, when the two countries signed the Oregon Treaty, giving Great Britain the part north of 49° north latitude and giving the United States the part south of 49° north latitude.
Washington & Oregon.
Oregon, Washington and California border the Pacific Ocean.
Washington and Oregon
If you mean which two states border BOTH Nevada and Montana, the answer is Utah and Wyoming.
Oregon and Idaho are the two states that border Washington state.
Oregon and Washington
Washington State borders two US States: to the south is Oregon, Idaho is to the east. The country of CANADA , specifically, the Provence of British Columbia is to the north and The Pacific Ocean is to the west.
California and Oregon did not share a border with the 21 other Union states.
Washington and Idaho
Washington and Oregon border the Columbia River.
There are five such US States, choose three: Alaska, California, Hawaii, Oregon, and Washington.
Oklahoma