Sites of the Central Plains and Oneota traditions in the Lovewell Reservoir locality, north-central Kansas, provide radiocarbon dates critical to the problem of relations between these Late Prehistoric cultures. Statistical tests of dates from eight sites of that period suggest late thirteenth century occupation by both traditions, and perhaps a third. Despite temporal and geographic proximity, there is no clear archaeological evidence of interaction between these distinct cultures at Lovewell. Temporal placement of Oneota sites at Lovewell is also critical to identification of candidate sites or areas of origin for migrants to that locality. Dates from other western Oneota sites (Leary, Swantek, Ashland, and Dixon) post-date A.D. 1300, indicating they could not have been points of origin for these migrants. Pending a greater sample of radiocarbon dates from all western Oneota sites, hypotheses are offered that posit late thirteenth century Oneota migration to the Lovewell locality from an as yet unidentified Oneota locale that may have displaced some CPt groups.