Beside being one of Sasquatch's hang outs.The area is known for its high concentration of waterfalls, with over 90 on the Oregon side of the Gorge alone. Many are along the Historic Columbia River Highway, including the notable 620-foot Multnomah Falls. Cool news: The Columbia River Gorge formation started approximately 40-60 million years ago. The granite from within the earth was lifted up from the pressure of molten lava from inside the earth which caused the outline of the Columbia Basin. Every Bead is made with the Earth gathered from the Columbia River Gorge on the border of Oregon and Washington state.