The Ironstone 100K is a point-to-point “Ridge and Valley Appalachian” 100 kilometer ultramarathon in Southwest Central Pennsylvania. Amazing in its terrain and rich in heritage, the ultramarathon starts at Canoe Creek State Park in Blair County and utilizes the Standing Stone, Mid State, and Lower Trails before ending in Greenwood Furnace State Park in Huntingdon County.
With its unforgiving technical terrain, it will be one of the most challenging ultras in the region, on par with races like Eastern States 100, Black Forest 100K and Worlds End Ultramarathon. The most unique feature of the Ironstone 100K is the ridge running atop Tussey Mountain, one of the longest named ridges in the Appalachians - a folded and fractured ridgeline of sandstone and quartzite. Other features include old-growth pines at Alan Seeger Natural Area, Little Juniata Natural Area, the Lower Trail rails-to-trail along the Frankstown Branch of the Juniata River and the historic limestone kilns at Canoe Creek State Park.
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