onnects the Linn County Metro area to Waterloo, IA Features & Sites: Multi-use trail used for biking, hiking, in-line skating, cross-country skiing, running, and nature study. Follows the floodplain of the Cedar River through forested areas, wetlands, and rolling farmlands. Campgrounds are located at the trail at McFarlane Park and Blackhawk Park. This page displays the Linn County section only. See the Nation Wide Trails Map for the complete trail.