The only people living along the banks of the LaCreole River before 1842 were Native Americans and a few itinerant French Canadian fur trappers who, according to local lore, bestowed its name. Wagon trains first arrived in 1843 with these pioneers settling along the LeCreole River's banks. The community of Cynthian grew on the north side of the LaCreole River, the area of north Dallas today. The LaCreole River evolved into the Rickreall, and Cynthian was renamed Dallas when it relocated to the south banks of the river. Dallas, the county seat of Polk County, is rich both in its history and its heritage, with many of the old buildings and early homes still in use. Numerous descendants of those original 1843 and 1844 pioneer families continue to call modern Dallas home.