In 4 days · Sat, Oct 10, 2026
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Saturday, October 10th, 2026
4500 Carbon Canyon Road, Brea CA
5K · 10K
59–81°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2025
62–92°F
dry
2024
57–83°F
dry
2023
59–75°F
dry
2022
62–79°F
dry
2021
52–81°F
dry
2020
62–76°F
dry
2019
56–85°F
dry
2018
59–72°F
dry
2017
62–87°F
dry
2016
61–87°F
dry
Best months to race in California →
Race-day ready
Everything but the shoes.
Real running socks, a bib belt, anti-chafe — the cheap upgrades that matter.
Race-day forecast · Saturday, Oct 10
Sunny · 76–94°F
Saturday, Oct 10starts near 76°F · 3% chance of rain · wind up to 10 mph
About this race
Run it, hike it, and conquer the trails of the stunning and expansive Chino Hills State Park! Choose the 5K or 10K to challenge yourself with the beauty of trail running or hiking, all while soaking in the tranquility and scenic views, with trails stretching as far as the eye can see on most of the course. Your experience will be captured in race photos included with registration, the shirt you’ll wear with pride, and your finisher patch. Age group awards for first place finisher in age these nine age groups <9, 10-19, 20-29, 30-39, 40-49, 50-59, 60-69, 70-79, 80+. Course maps are here.
Please note, this event may be subject to weather conditions and could be rescheduled due to rain or other event and venue restrictions. Participants will be automatically transferred to the new date, and no refunds will be provided.
Parking at California State Parks is $10 per vehicle (cashless payment only), or you can park at the nearby Carbon Canyon Park for $5. Carpooling is encouraged!
Parking at Chino Hills State Park - Discovery Center lot opens at 6:30am. Packet pick-up starts at 7:00am. The address is 4500 Carbon Canyon Road, Brea, CA 92823 - Discovery Center location.
COURSE MAPS HERE
Course map
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