L.A Triathlon 2025

San Dimas

15% OFF

Saturday, October 04, 2025

Promo Code: 15RACE

15RACE

Welcome to the oldest, continuous running triathlon in the world.

Since 1983 triathletes have traveled to Bonelli Park, on the eastern edge of Los Angeles County, to learn the sport; to shake off the winter rust and get ready for the upcoming season; to see old friends and make new friends; and to be in the midst of a fun, high-energy, multi-sport setting. The LA Tri-Series events accomplish all of that and more! If you are new to the sport of triathlon this is the perfect setting to learn open water swimming in a safe environment, cycling around as a safe course with little traffic, and a well-supported run to one of the most beautiful finish lines you will experience. If you are an experienced triathlete who has been waiting for a warm water swim and safe bike course to start off the season – this is for you also.

Super Sprint Triathlon (& Relay)

Swim 300M – Bike 12K (1 Lap)- Run 5K

Championship Triathlon (& Relay)

Swim 1K – Bike 34K (3 Laps) – Run 10K

IronBruin Collegiate Division

Swim 1K – Bike 24K (2 Laps) – Run 5K

Championship – Duathlon (& Relay)

Run 5K – Bike 34K (3Laps) – Run 10K

World Class Event

We pride ourselves on ‘athlete first’ management with an eye towards a Best In Class experience for the athlete, whether a beginner or an experienced triathlete – you are our priority. We are honored to have many of the most recognized elite athletes in the sport call both “Bonelli” and the “LA Series” a regular stop in the annual triathlon circuit and in many cases where they got their triathlon start.

An Amazing Venue

Bonelli Park is the perfect venue for the ultimate triathlon training. The lake in the middle of LA is easily accessible, calm and well supported with lifeguards; the bike course has rolling hills and no left turns to navigate against traffic; the run is near the lake on trails and paths that are easy to navigate until you reach the finish in a beautiful picnic setting.

Fun for Everyone

Our event has a super relaxed setting were spectators can mingle with the athletes afterwards and watch the run and bike course — all from really close to the finish line. We also get some of the biggest names in the sport competing in every event. It’s the perfect mix.

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