- The Walla Walla River is a tributary of the Columbia River which runs through portions of eastern Washington and Oregon in the United States. Originating in the Blue Mountains, its two forks merge south of the town of Milton-Freewater, before continuing north into a wide river valley and floodplains as it approaches the Washington border. It receives Mill Creek as a tributary near the city of Walla Walla, alongside various anabranches formed by distributary channels which split off from the Walla Walla and rejoin it later on. It flows west and receives the Touchet River later in its course, meeting the Columbia River at a delta on Lake Wallula.
- Woodburn Falls (waterfallsnorthwest.com)
Of the three modest waterfalls Lacamas Park harbors, Woodburn Falls is the most forgettable. Seasonal Woodburn Creek, sure to run dry by June, splashes over a ledge amid rather thick deciduous growth that provides a modest wilderness feel. While when viewed up close the falls appear to drop about 20 feet, lidar data indicates its total drop to be closer to 40 feet - the upper half of the falls is simply out of view due to foreshortening and the close proximity of the trail to the base of the falls.