ABWR Half Marathon - Riverside
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Hidden Valley 2027 : Riverside
Hidden Valley in Riverside, California is a running event on January 31, 2027 at the Hidden Valley Nature Center (11401 Arlington Ave). The event offers multiple distance options on a marked, out-and-back path that uses loops from the start/finish area.
Distances available:
- 5K
- 10K
- 15K
- Half marathon
The course begins with a 1.2 mile out and 1.2 mile return to the start/finish (2.4 miles) and then continues east for the remainder of each loop. The 5K turns around about 0.35 miles past the start/finish. The half marathon uses an approximately 4.37 mile loop that is repeated three times. All turnarounds are marked with cones, chalk or spray chalk and signs. The aid station at the start/finish turnaround supplies water cups, water bottles, Gatorade cups and GU gels. Park and portable restrooms are located near the start/finish area; these are the primary restrooms on course.
Every registration includes a custom finisher medal, a drawstring goodie bag, chip timing, live results at finish, free photos and free videos. Race-day registration is available and fees are listed for each distance. There is a $6 parking fee at the nature center. Running or walking with a stroller is allowed. The half marathon has a 3 hours 30 minutes time limit. No refunds; transfers are handled by the organizer. The event is held rain or shine. Visit the organization's website for the most recent information.
