New Year's One Day

New Year's One Day is a unique running event taking place from December 31, 2025, to January 1, 2026, at Hellyer County Park in San Jose, California. Participants can choose from various challenges, including 24-hour solo and team events, a 100-mile race, and shorter solo options of 12 and 6 hours. The course features a 1.0-mile loop around Cottonwood Lake, certified by USATF.

Runners can enjoy fully stocked aid stations and the opportunity to set up personal support along the route. Awards will be given for top finishers in multiple categories, making it a festive way to ring in the New Year. Visit the organization's website for the most recent information.