Part of the Cottonmill to Fort Kearny Trail system.
From the City of Kearney web site:
You can begin this trail loop at the West Lincolnway Park Trailhead, going south on 30th Avenue to Railroad Street where you will turn East until you connect with the Tailrace Trail portion, then you can follow the Tailrace Trail north towards UNK, and a portion of The Links Trail until you are back to 30th Avenue just north of West Lincolnway Park.