The Snake and Clearwater rivers meet at the foot of Lewiston Hill, with Clarkston on the Washington bank to the west and Lewiston, Idaho on the east. The confluence is what made this a place at all: it is the furthest inland port that ocean-going barges can reach by river, 465 miles from the mouth of the Columbia at Astoria, and the eastern terminus of one of the longest stretches of slack-water navigation in the world.
There is a paved riverfront path on the Washington side, with views across the green-then-blue surface where the two rivers mix. Watch for sturgeon fishermen along the banks and barges from time to time being eased through the locks below at Lower Granite Dam. The Lewis and Clark expedition arrived at this exact spot in October 1805 — having portaged west from the Bitterroots — and built their canoes here for the run down to the Pacific.