Half Marathons in California
California has 103 upcoming half marathons scheduled for 2026. That is the highest event count for half marathons of any state. The calendar runs year-round — busiest in August, October, and December, quietest in February, May, and June. Long Beach is the busiest city with 61 races, ahead of San Diego (5) and Huntington Beach (4).
Half marathons by month in California
Aug (17) · Dec (17) · Oct (15) · Nov (15) · Sep (9) · Jan (6) · Mar (5) · Apr (5) · Jul (5) · May (4) · Feb (3) · Jun (2)
Showing 24 of 103
Running
LBC - Good Vibes Run 5K, 10K, & Half Marathon by Califlow Runs
Long Beach, CA
Running
LBC - Good Vibes Run 5K, 10K, & Half Marathon by Califlow Runs
July 25, 2026
Long Beach, CA
Running
LBC - Good Vibes Run 5K, 10K, & Half Marathon by Califlow Runs
July 25, 2026
Long Beach, CA
Running
BOO-gie Glow Run 5K 10K Half Marathon - SummerWeen Series by Califlow Runs
July 26, 2026
Long Beach, CA
Running
Tiki Time Run: Paradise Run 5K, 10K, & Half Marathon by Califlow Runs
August 1, 2026
Long Beach, CA
Running
Sundae Funday - Ice Cream Run 5K, 10K, and Half Marathon by Califlow Runs
August 9, 2026
Long Beach, CA
Running
Long Beach Easy Breezy 5K, 10K, & Half Marathon by Califlow Runs
Long Beach, CA
Running
Long Beach Easy Breezy 5K, 10K, & Half Marathon by Califlow Runs
August 16, 2026
Long Beach, CA
Running
Alien Invasion Man-5K 10K & Half Marathon - Health is Wealth Expo
August 16, 2026
Long Beach, CA
Running
Run Happyish 5K. 10K. Half Marathon by Califlow Runs
Long Beach, CA
Running
Run Happyish 5K. 10K. Half Marathon by Califlow Runs
August 16, 2026
Long Beach, CA
Running
Californian Dreamin 5K, 10K, & Half Marathon by Califlow Runs
August 23, 2026
Long Beach, CA
Running
Night of the Running Dead 5K, 10K, 1 Miler, Half Marathon SummerWeen Series by Califlow Runs
August 29, 2026
Long Beach, CA
Running
Pirates Plunder – 5K, 10K, 10-miler, and Half Marathon
September 6, 2026
Long Beach, CA
Top Cities for Half Marathons in California
Frequently asked questions
How long is a half marathon?▾
A half marathon is 13.1 miles (21.1 kilometers). It is one of the most popular race distances in the US, attracting over 2 million finishers annually. Browse half marathons on RACE to find one near you.
How should I train for my first half marathon?▾
Most beginner training plans are 10-12 weeks long and gradually build your weekly mileage. A typical plan includes 3-4 runs per week with one long run that peaks around 10-11 miles before race day.
What is a good half marathon time?▾
The average US half marathon finish time is about 2 hours 10 minutes. Beginners often aim for under 2:30, while competitive runners target sub-1:45. Focus on finishing strong rather than a specific pace for your first race.
What are the biggest half marathons in the US?▾
The largest include the United Airlines NYC Half, RBC Brooklyn Half, Disney Princess Half Marathon, and the Rock 'n' Roll series events in Las Vegas, Nashville, and San Diego. You can find all of these on RACE.