Ironstone 100K Ultra

Name: Ironstone 100K Ultra
Start: 2026-07-11
End: 2026-07-12
Location: Hollidaysburg

JUL

11-12

2026

Ironstone 100K is a rugged 100 km trail ultramarathon through the Allegheny wilds on July 11 and 12, 2026. Expect remote terrain, minimal aid stations and no pacers for a true self reliant test of endurance.

11-12 Jul 2026

Hollidaysburg, Pennsylvania

Website

100 kilometers

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Event overview

Ironstone 100K is a point-to-point ultramarathon of 100 km held on trails in the Allegheny region. The event is scheduled for July 11-12, 2026. The race is organized by the Eastern States Trail-Endurance Alliance. Organizers state that pacers are not allowed and that aid stations are minimal.

Course and logistics

The race begins at the Ironstone Tramline and follows wild trail terrain through the Alleghenies. A course update notes the Dilling Bridge on the Lower Trail is closed near mile 11.4. There is a traffic alert for Aid Station 4 at Alfarata because the event coincides with the Huntingdon County Fireman’s Festival in Alexandria. Race logistics include the use of support vehicles and event equipment referenced by organizers. Bib numbers for entrants have been assigned. Visit the organization's website for the most recent information.

100 km

Ironstone 100k