These data depict the National Hydrography Dataset Plus Version 2.1 (NHDPlusV2.1) flowline representation of the National Wild and Scenic Rivers System throughout the conterminous United States as of 2018. U.S. Forest Service geospatial data on National Wild and Scenic River segments (USFS WSR Segment) from 3/1/2016 were joined to the NHDPlusV2.1 to create the Wild and Scenic Rivers 2018 Linked to the NHDPlusV2.1 (wsr_nhdpv2.1) data. To ensure these data correctly represented the NHDPlusV2.1 flowline delineation of the National Wild and Scenic Rivers System, each wsr_nhdpv2.1 river segment was examined against the USFS WSR Segment data to check for duplication and/or omission of Wild and Scenic River segments. Spatial information from the National Wild and Scenic Rivers System (WSR) website was used to compare and improve these data as well. Additional information regarding river and outstanding remarkable value (ORV) descriptions were compiled from the WSR website and information regarding designation reaches, river management agencies, classifications, and ORV designations were compiled from USFS Segments data attribute information. This information was collected in order to track specific details concerning river designations and justify the representation of each river in the wsr_nhdpv2.1 data.