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Brazen New Year's Eve 2026

Castro Valley, California, United States

calendar_today 31 Dec, 2026

directions_run Running

sell $55.63 – $103.66

About the Event

Whether you're looking to squeeze in your first trail run or you're looking to log that 1,000th mile before the clock strikes midnight on 12/31/2026, this is your chance.Note: This year we will have back-to-back events at Lake Chabot, Castro Valley with a 5K, 10K and half marathon!New Year's Eve, Thursday, 12/31/2026New Year's Day, Friday, 1/1/2027*Make it a double and join us both days and earn the Brazen New Year Mega-Medal!*Note: Each race is a unique event on its own and requires separate registration.

Races Offered

NYE 10K

Dec 31, 2026

straighten

Distance — 10K

terrain

Type — Running

timer

07:30

sell

$84.45

NYE 5K

Dec 31, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

07:30

sell

$74.84

NYE Half Marathon

Dec 31, 2026

straighten

Distance — 21K

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.

thermostat Temperature

10.7° / 16.4°

wb_sunny Feels like

9.5° / 15.6°

light_mode Avg sunshine hours

7h 48m

water_drop Avg rainfall

6.5 mm

ac_unit Avg snowfall

—

air Avg wind speed

6.2 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (4.0)

humidity_mid Humidity

86.4%

wb_twilight Sunrise

05:05

nightlight Sunset

23:00

About Castro Valley

Learn more about the host city, Castro Valley.

Seward ("SOO-word") is a small port city located at the head of Resurrection Bay on the Kenai Peninsula in Southcentral Alaska. Seward was named in honor of William H. Seward, President Abraham Lincoln's Secretary of State, who was responsible for negotiating the purchase of Alaska from Russia in 1867.