New Year's Eve Half Marathon - Hidden Valley
Always double-check with the organizer's website! This page may contain affiliate links.
New Year's Eve 5k 10k 15k Half Marathon - Hidden Valley Nature Center
The event offers multiple road and trail distance options on a scenic course along the Santa Ana River at Hidden Valley Nature Center in Riverside, California, on December 31, 2026. The marked course uses out-and-back loops on a shared path; participants are asked to be courteous to pedestrians, runners, and cyclists.
Distances offered:
- 5 km out-and-back
- 10 km two 5 km loops
- 15 km three 5 km loops
- Half marathon three 4.36 mile loops
Aid and facilities: park restrooms and portable restrooms are available near the start and finish and are the only restrooms on course. An aid station at the turnaround provides water cups, water bottles, Gatorade cups, and Gu gels. Running or walking with a stroller is allowed. The half marathon has a 3 hour 30 minute time limit; an early start may be available on request to the organizer.
Registration and event services note included items: custom finisher medals, drawstring goodie bags, chip timing, free videos and photos, live results, trophies and achievement badges, an event app and race tracking features, assorted snacks, group discounts, and age group awards (picked up at the race only). No refunds; transfers handled by the organizer.
Location details include Hidden Valley Nature Center, 11401 Arlington Ave, Riverside, CA 92505. Parking options include paid parking at the Nature Center or a nearby free overflow lot; observe posted parking instructions. Visit the organization's website for the most recent information.
