The Holden Arboretum Trailblazer 5K

The Holden Arboretum Trailblazer 5K is a dog-friendly trail race at the Holden Arboretum in Willoughby, Ohio. The 5K course winds through forested arboretum grounds, offering fresh air and scenic woodlands. The event features MyLaps chip timing with live results, a race T‑shirt, and post-race refreshments, plus free admission to the arboretum after finishing.

Awards go to the top male and female finishers, plus the top three in each age group. Dogs are welcome, and the course map is available online. The race is hosted by Hermes Sports & Events.

Date: Sunday, September 14, 2025. Visit the organization's website for the most recent information.