The Wakarusa River is a tributary of the Kansas River, approximately long, in eastern Kansas in the United States. It drains an agricultural area of rolling limestone hills south of Topeka and Lawrence. Description It rises in several branches located southwest of Topeka. The main branch rises on the Wabaunsee-Shawnee county line, approximately southwest of Topeka and flows east. The South Branch rises in eastern Wabaunsee County, approximately southwest of Topeka and flows east-northeast, joining the main branch south of Topeka. The main branch flows generally east, flowing south of Lawrence. It joins the Kansas River in Douglas County at Eudora, approximately east of Lawrence. It is impounded by Clinton Dam approximately southwest of Lawrence to form Clinton Lake. The river is known for its gentle current that winds through river-level outcropping rocks, primarily of Pennsylvanian limestone. This reach of the river was inhabited by different Native American tribes, including the Kansa and Osage Nation in the 18th century. During 1819-1820, Major Stephen H. Long referred to this tributary as "Warreruza". According to a 1912 encyclopedia, the name comes from an Indian legend, wherein a young woman was crossing the river on horseback. She exclaimed "Wakarusa!", meaning "hip deep", and the name stuck. The meanings "thigh deep" and "river of thick weeds" are also recorded. After the U.S. acquired this region, the Shawnee people were relocated here during the early 19th century. Ridgelines of this historic watershed defined wagon train routes first used by Santa Fe Trail pioneers and Oregon Trail emigrants. During the Great Migration of 1843, the fords used for crossing this meandering river were among the many topographic challenges emigrant wagon trains had to master along the Fremont-Westport Trail (1843-1848) named after John C. Frémont. This Freedom's Frontier route also was called the California Road during the 1849 gold rush. Also, during the days of the Kansas Territory, the limestone outcroppings of the river presented great challenges to early white emigrants attempting to ford the stream in their wagons. Oregon Trail wagons were often dismantled, lowered down the limestone beds, towed across, then lifted by rope to the opposing bank. Several Shawnee created ferry operations at river crossings in the 1850s, including Blue Jacket's Ferry near Coal Creek at Sebastian. The river's gentle current and scenic banks made it an early recreation spot for citizens of Lawrence (which was originally called "Wacharusa"). See Indian Territory (1820-1840) The