Norris Ultra Dam Hard Trail Race

The Norris Ultra Dam Hard Trail Race is a trail-running event held at Norris Dam State Park in Norris, Tennessee. It offers two distances, 25k and 50k, both run on single-track trails and jeep roads across Norris Dam State Park and the Norris Municipal Watershed. The 25k is a single loop; the 50k is two loops.

Aid stations are spread along routes accessible by road to support crews and spectators. Time limits are 4 hours 40 minutes for the 25k and 9 hours for the 50k. Accommodations include park campgrounds with hookups and cabins, plus nearby lodging; optional live tracking via Webscorer is available for fans. Visit the organization's website for the most recent information.