The Twin Sisters are distinctive basalt features within the Wallula Gap, created millions of years ago with the massive outpouring of Columbia River basalt lavas. Though it seems everyone has had a name for them, the official name remains the "Twin Sisters."
Near Wallula Gap on the high slopes overlooking the Columbia River, southeast of Pasco stand the notable twin basalt towers known in Native American stories as the “Twin Sisters.” Also known as the "Two Captains" – in tribute to Lewis and Clark – scientific theory attributes the existence of these two pillars to the catastrophic Ice Age Floods. Captivated by the pillars' uncommon beauty, we found ourselves winding our way to the backside and following a trail to the top. The extraordinary views made it well worth the trek.
