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From what I know, it is not a river that forms much of the border. It is the Bitterroot mountain range.
Wiki User
∙ 15y ago
Wiki User
∙ 10y agoThe Snake River forms the state border for a short distance in the southeast corner of Washington state. It is the only section of the eastern border that is not a straight line.
Wiki User
∙ 15y agoThe Snake River.
Wiki User
∙ 13y agoSnake River
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Name the river that forms a border between the states of Washington and oregen?
The Columbia River forms a border between the states of Washington and Oregon.
What river that forms the border between the states of Washington and Oregon?
Columbia river
Whats the river that forms a border between the states of Washington and Oregon?
michigan
What is the river that forms a border between the states of Washington and Orgeon?
The Columbia River
Name the that forms a border between the states of Washington and Oregon?
Columbia river
What border does the Columbia river make?
The Columbia River lies between the States of Washington and Oregon, and forms the border between the two.
What river forms part of the border between two northeastern states and flows into the pacific ocean?
The Columbia River forms most of the border between Oregon and Washington before flowing into the Pacific Ocean.The river that forms part of the border between two northwestern states and flows into the pacific ocean is the Columbia river.
What is the name of the river that forms a border between the states of Washington and Oregon?
The Columbia River.
Name the riverthat forms a border between the states of Washington and Oregon?
The Columbia River.
What river forms the border between Washington and Oregon?
The Columbia River.
Name a river that forms a major part of the border between the states of Washington and Oregon?
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What is the river that forms a border between the states of Washington and Oregon?
Columbia river
