Indiana Trail 100

Indiana Trail 100 is an Ignite Trail Series ultramarathon held at Chain O’Lakes State Park in Albion, Indiana, on October 11–12, 2025. The event offers 100-mile, 75-mile, and 50-mile race distances run on a multi-loop trail course. It serves as a Western States qualifier and is renowned for its enthusiastic volunteer network.

Registration opens November 1, 2024 and closes about two weeks before race weekend; there is no day-of registration, and field caps may be set by distance with a waiting list for some entries. The IT100 is part of a broader series with detailed course maps and athletes’ guides available on the site. Visit the organization's website for the most recent information.