10K Races in California
California has 254 upcoming 10K races scheduled for 2026. That is the 3rd-highest event count for 10K races of any state. The calendar runs year-round — busiest in August, September, and December, quietest in March, April, and June. Long Beach is the busiest city with 63 races, ahead of Los Angeles (35) and San Diego (29).
10K races by month in California
Sep (40) · Aug (38) · Dec (38) · Oct (35) · Nov (34) · Jul (18) · Jan (15) · Feb (14) · Apr (7) · May (7) · Mar (6) · Jun (2)
Showing 24 of 254
Running
CaliFlow Verano Run - Griffith Park Summer 5K • 10K • 1 Miler
July 19, 2026
Los Angeles, CA
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
Top Cities for 10K Races in California
Frequently asked questions
How long is a 10K race?▾
A 10K is 6.2 miles (10 kilometers). It is a popular step-up distance from the 5K and a great intermediate goal for runners building toward a half marathon.
What is the largest 10K in the US?▾
The AJC Peachtree Road Race in Atlanta is the largest 10K in the world, drawing over 60,000 runners every Fourth of July. The BOLDERBoulder in Colorado is another massive 10K with 45,000+ participants.
What is a good 10K time?▾
The average US 10K finish time is around 55-60 minutes. Competitive runners aim for sub-45 minutes, while beginners often target finishing under 1 hour 10 minutes.
How do I train for a 10K?▾
A typical 10K training plan is 8-10 weeks with 3-4 runs per week, including one longer run that builds to 6-7 miles. If you can comfortably run a 5K, you are ready to start training for a 10K.