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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 point-to-point ultramarathon set in the scenic Allegheny Mountains, starting at Canoe Creek State Park and finishing at Greenwood Furnace State Park. This 100-kilometer race features rugged terrain, including sections of the Standing Stone, Mid State, and Lower Trails, making it one of the toughest ultras in the region. Participants must complete the race within 23 hours, navigating technical trails with limited aid stations and no pacers. To enter, runners must have completed a qualifying 50K trail race. Finishers receive a unique medal, 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 Apr 12

Dirty Kiln Trail Races At Canoe Creek

Hollidaysburg

10 km

13 mi

The Dirty Kiln Trail Races at Canoe Creek, organized by Allegheny Trailrunners, Inc., will take place on April 12, 2025. This event features two race options: a Short Course (approximately 10K) and a Long Course (Half-Marathon). Participants will navigate a variety of trails, including wide paths, w..

Sunday May 4

Greenwood Furnace Trail Challenge

Huntingdon - 20 mi from Hollidaysburg

10 km

13 mi

The Greenwood Furnace Trail Challenge is an exciting running event held at Greenwood Furnace State Park in Huntingdon, PA. Participants can choose between a 10K and a half-marathon, both featuring rugged terrain and scenic views. The 10K route includes a challenging climb up Greenwood Spur, while th..

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, hosted by the Johnstown Area Heritage Association and the Cambria County Conservation & Recreation Authority, commemorates the devastating 1889 flood in Johnstown, Pennsylvania. Scheduled for May 24, 2025, this event features a 14-mile course starting at the Sou..

Saturday Jul 5

Chernisky Classic

Ebensburg - 18 mi from Hollidaysburg

5 km

10 km

The Chernisky Classic is an annual running event held in Ebensburg, PA, featuring a 5K run/walk and a 10K run on the scenic Ghost Town Trail, recognized as the 2020 DCNR Trail of the Year. Scheduled for July 5, 2025, this family-friendly event includes a free Firecracker Race for children aged 8 and..

Saturday Sep 13

Rock 'n The Knob Trail Challenge

Claysburg - 9 mi from Hollidaysburg

10 km

25 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..