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Ironstone 100K Ultra

Name: Ironstone 100K Ultra
Start: 2025-07-12
End: 2025-07-12
Location: Hollidaysburg

Hollidaysburg, United States • 12 Jul 2025

The Ironstone 100K Ultra is a challenging 100-kilometer point-to-point ultramarathon held in the Allegheny Mountains of Pennsylvania. Starting at Canoe Creek State Park in Blair County and finishing at Greenwood Furnace State Park in Huntingdon County, the course traverses rugged trails including the Standing Stone, Mid State, and Lower Trails. Notable features include ridge running atop Tussey Mountain, old-growth pines at Alan Seeger Natural Area, and craggy ledges at Indian Wells. The race demands technical skill, with limited aid stations, no pacers, and night running, all to be completed within 23 hours. Finishers receive a unique metal award, a flannel shirt, and complimentary beverages. Visit the organization's website for the most recent information.

United States Pennsylvania Hollidaysburg

Race information

Website Registration

100 km

100k

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday May 24

Path Of The Flood Historic Races

Johnstown - 29 mi from Hollidaysburg

5 km

8 mi

14 mi

The Path of the Flood Historic Races is an annual event in Johnstown, Pennsylvania, commemorating the devastating 1889 flood. The race features multiple distances, including a 14-mile course that traces the path of the historic floodwaters, starting at the ruins of the South Fork Dam and passing thr..

Saturday Jul 5

Chernisky Classic

Ebensburg - 18 mi from Hollidaysburg

5 km

10 km

The Chernisky Classic is an annual family-friendly running and walking event held in Ebensburg, PA, featuring a 5K and 10K race along the scenic Ghost Town Trail, named the 2020 DCNR Trail of the Year. The event includes a free Firecracker Race for children under 8, with firefighters present for int..

Saturday Sep 6

Jim Mayer Trail

Vinco - 25 mi from Hollidaysburg

5 km

10 km

The Jim Mayer Trail Family Fun Run is part of the Cambria County Trails Series, featuring both 5K and 10K distances along the scenic Jim Mayer Riverswalk Trail in Johnstown, PA. Participants will enjoy a picturesque route alongside the Stonycreek River, passing notable landmarks such as the Trail Ar..

Saturday Sep 13

Rock 'n The Knob Trail Challenge

Claysburg - 9 mi from Hollidaysburg

10 km

20 km

50 km

The Rock 'N The Knob Trail Challenge is Pennsylvania's highest trail race, taking place in Claysburg. Scheduled for September 13, 2025, the event features three challenging courses: an Ultramarathon (50K), a Medium Distance Course (20K to 25K), and a Short Course (approximately 10K). Each course off..

Saturday Oct 4

Chernisky Ghost Town Trail-a-thon

Ebensburg - 18 mi from Hollidaysburg

The Chernisky Ghost Town Trail-a-thon, held in Ebensburg, PA, is a multi-distance running and biking event set along the scenic Ghost Town Trail and C & I Extension. Participants can choose from a marathon (26.2 miles), 15-miler, 5k, or a fun "Couch Potato 0.0k" event. The marathon and 15-miler star..