The 2020 GAP Trestles Marathon and Half Marathon was cancelled due to COVID-19. There will not be an Altis race series in 2021. The plan is to conduct the seventh edition of this race on Friday September 30, 2022.

Both the marathon and half marathon start at 8:00AM. This event will take place in its entirety in Pennsylvania on the outstanding Great Allegheny Passage. Runners will cross three trestles on the course – to include the 1908 foot long Salisbury Viaduct (pictured above) over the Casselman River Valley, the 910 foot long Keystone Viaduct, and the historic Wills Creek Bollman Truss Bridge.