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The Improve Every Day Half Marathon

Name: The Improve Every Day Half Marathon
Start: 2026-12-12
End: 2026-12-12
Location: San Diego

San Diego, California, United States

calendar_today 12 Dec, 2026

directions_run Running

language Official Website

sell $45.00

About the Event

The Improve Every Day Half Marathon is built around one idea: every mile out there is proof of what you're capable of. This December 12th in San Diego, we're bringing that to life on a looped course where every lap shows you how far you've come.

Half marathon runners will complete just over 3 laps. Each time you come back around you'll feel the crowd, feed off the energy, and find out what you're truly capable of. The loop format means you're never alone out there and the support never stops.

Whether you're running your first half or chasing a new PR, you're out there with people who get it. People who showed up for themselves the same way you did.

Field is capped at 1,000 runners. Price goes up as spots fill:

Spots 1–250: $45
Spots 251–500: $55
Spots 501–750: $65
Spots 751–1,000: $75

What's included:

- lùth finisher shirt

- Hydrations Stations on course

- Loop-style race

- Post-race hang out

Races Offered

The Improve Every Day Half Marathon

Dec 12, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

06:00

sell

$45.00

Weather History

These values represent the 3-year monthly averages for December in San Diego.

thermostat Temperature

9.7° / 19.1°

wb_sunny Feels like

7.5° / 17.4°

light_mode Avg sunshine hours

8h 29m

water_drop Avg rainfall

1.0 mm

ac_unit Avg snowfall

—

air Avg wind speed

6.5 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

71.0%

wb_twilight Sunrise

07:42

nightlight Sunset

17:45

About San Diego

Learn more about the host city, San Diego.

San Diego is a city on the Pacific coast of Southern California, next to the Mexican border. It is the eighth-most populous city in the U.S. and second-most populous city in California with a population of over 1.4 million, while the San Diego area with over 3.3 million residents is the 18th-largest metropolitan area in the country. San Diego is the county seat of San Diego County. It is known for its mild Mediterranean climate, extensive beaches and parks, long association with the United States Navy, and recent emergence as a wireless, electronics, healthcare, and biotechnology development center.