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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 of Pennsylvania. Starting at Canoe Creek State Park and finishing at Greenwood Furnace State Park, the race covers a rugged 100 kilometers, featuring technical terrain and breathtaking views along the Standing Stone, Mid State, and Lower Trails. Participants must complete the course within 23 hours, facing obstacles such as limited aid stations and night running. To qualify, runners must have completed a 50K trail race prior to registration. 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 challenging 10K route and a rugged half-marathon, both set against the stunning backdrop of Rothrock State Forest. The half-marathon features a..

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 running event in Johnstown, PA, commemorating the devastating flood of 1889. The 2025 edition marks its 11th running, featuring a 14-mile course that begins at the South Fork Dam ruins and includes a scenic route through the historic Staple Bend Tunn..

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 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..