New Year's One Day

New Year's One Day is an endurance running event held at Hellyer County Park in San Jose, California. Participants can choose from various race formats including 24-hour, 12-hour, and 6-hour solo runs, a 100-mile race, and team events for the same durations. The course is a certified 1.03-mile flat loop around Cottonwood Lake, featuring an asphalt path.

The event offers fully stocked aid stations every mile with snacks, hydration, and evening hot food. It is a cupless race to reduce waste, so runners bring their own fluid containers. Awards are given for top finishers, and real-time lap tracking is provided via chip timing. Visit the organization's website for the most recent information.