Ironstone 100K
About this race
The Ironstone 100K. Legs of Iron. Resolve Like a Stone.
Ironstone 100K is a savage point-to-point 100 kilometer ultramarathon on the wildest trails in the Ridge and Valley region of 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 race begins at 2pm in Canoe Creek State Park and soon travels along the Frankstown Branch of the Juniata River on the Lower Trail - a fast and flat section of rail trail.
The most unique feature of the Ironstone 100K is the ridge running atop Tussey Mountain on one of the longest named ridges in the Appalachians - a folded and fractured ridgeline of sandstone and quartzite - on the Mid State Trail. Other features include old-growth pines at Alan Seeger Natural Area, a mountain pass at Little Juniata Natural Area, craggy ledges at Indian Wells and eventually onto the Standing Stone Trail and to the finish at the historic Greenwood Furnace State Park.
Runners need to finish the race in 23 hours - a seemingly easy task until you spend your first mile after crossing the Little Juniata River. The technical terrain, limited number of aid stations, no pacers and night running make this race a formidable challenge. Finishers are rewarded with a unique metal award, our famous flannel shirt and free beer and beverages - all on us!
Do you have legs of iron and resolve like a stone to complete the Ironstone?
Pick your distance
Trail running
100K Point-to-Point
Race-day daylight
We have no recorded weather for Hollidaysburg yet, but sunrise and sunset follow from the venue and the date.
The sun rises at 5:52 AM and sets at 8:45 PM local time (EDT) in Hollidaysburg on July 10, 2027 — 14h 52m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
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Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 6 Hollidaysburg events
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