Experience the thrill of running through Lake Chabot's scenic trails, where the air is crisp and the scenery is breathtaking. The 2026 New Year’s Eve and New Year’s Day events offer runners three distinct race options: a vibrant 5K, an invigorating 10K, or a challenging half marathon. On Thursday, December 31, 2026, lace up your shoes for the festive 5K and 10K races. As you wind through the lush forest paths and along the serene shores of Lake Chabot, the setting sun will paint the landscape in hues of orange and pink. The half marathon on Friday, January 1, 2027, promises a memorable journey with its mix of winding trails and flat stretches. For those seeking an extra challenge, participate in both days to earn the prestigious Brazen New Year Mega-Medal. Each race stands as a unique event, requiring separate registration. Whether you're new to trail running or aiming for that elusive 1,000th mile before midnight on December 31st, Lake Chabot offers an unforgettable experience. The atmosphere is electric with the promise of New Year’s Eve festivities and the hopefulness of New Year's Day. Join us at this special location where tradition meets innovation in a celebration of endurance and community spirit.
Races Offered
NYE 10K
Dec 31, 2026
straighten
Distance —
10km
terrain
Type —
Running
timer
07:30
sell
$84.45
NYE 5K
Dec 31, 2026
straighten
Distance —
5km
terrain
Type —
Running
timer
07:30
sell
$74.84
NYE Half Marathon
Dec 31, 2026
straighten
Distance —
21km
terrain
Type —
Running
timer
07:30
sell
$103.66
NYE Remote
Dec 31, 2026
straighten
Distance —
NYE Remote
terrain
Type —
Running
timer
07:30
sell
$55.63
Weather History
These values represent the 3-year monthly averages for December in Castro Valley.
thermostatTemperature
7.1° / 14.9°
wb_sunnyFeels like
4.7° / 13.5°
light_mode
Avg sunshine hours
6h 43m
water_drop
Avg rainfall
4.2 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
7.8 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (2.0)
humidity_mid
Humidity
84.6%
wb_twilight
Sunrise
08:15
nightlight
Sunset
17:52
About Castro Valley
Learn more about the host city, Castro Valley.
Castro Valley is an unincorporated town in the inner East Bay in the Bay Area of California. It has a population of about 60,000 and is located north of Hayward and east of San Leandro and south of the Oakland hills. Since it is unincorporated, Castro Valley is governed by the County of Alameda, which has its county seat in Oakland.
