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, in San Jose, California. Participants can choose from various challenges, including 24-hour solo and team races, a 100-mile run, and shorter solo events lasting 12 and 6 hours. The course features a 1.0-mile loop around Cottonwood Lake in Hellyer County Park, designed for runners of all levels.

The event promotes sustainability by being cupless, encouraging participants to bring their own hydration containers. Awards are given for top finishers in multiple categories, making it a competitive yet inclusive experience for all. Visit the organization's website for the most recent information.