31Dec
10K
Running
- Distance
- 10K
- Countdown
- 56 days
- Entry fee
- $34.99
Happy New Year 5K, 10K, 15K, Half Marathon
Riverside,
California,
United States
56 days left
raceascend.com
Date
31 Dec, 2026
Races
4 distances
Entry fee
$29.99 – $42.99
Runner rating
Be the first to rate
Website
Official website
Happy New Year 5K, 10K, 15K, Half Marathon
About the event
Ring in the New Year with the Happy New Year Race Series on December 31, 2026, along Riverside's scenic paths. Participants can choose from four challenging distances: a festive 5K to kick off their resolution journey, a spirited 10K for those looking to extend their run, an ambitious 15K for seasoned runners, and the full Half Marathon for endurance athletes aiming for a longer adventure.
Races offered
31Dec
15K
Running
- Distance
- 15K
- Countdown
- 56 days
- Entry fee
- $39.99
31Dec
5K
Running
- Distance
- 5K
- Countdown
- 56 days
- Entry fee
- $29.99
31Dec
Half Marathon
Running
- Distance
- 21.1K
- Countdown
- 56 days
- Entry fee
- $42.99
Weather history
3-year monthly averages for December in Riverside.
Temperature8.2° / 21.4°
Feels like5.4° / 18.5°
Sunshine hours8h 34m
Rainfall1.3 mm
Snowfall—
Wind5.7 km/h (Light breeze)
Humidity52.5%
Max UV indexLow (2.0)
Sweat lossLow
Course conditionsFirm and slightly soft
Sunrise07:47
Sunset17:43
About Riverside
Learn more about the host city, Riverside.
Riverside is a city in and the county seat of Riverside County, California, United States. It is named for its location beside the Santa Ana River in Southern California. It is the most populous city in the Inland Empire and Riverside County, 12th-most populous city in California, and 62nd-most populous city in the U.S. with a population of 314,998 at the 2020 census. The Riverside–San Bernardino metropolitan area at 4.74 million residents is the 12th-largest metropolitan area in the nation. Riverside is about 50 miles (80 km) east of downtown Los Angeles and is also part of the Greater Los Angeles area.
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