LA Tri Series 2025
SS
From Spectrum Sports Management
Saturday, October 4, 2025
Past event
8:00 AM PDT
San Dimas, California
$85.00–$188.00 · 3 races
Super Sprint, Sprint, Olympic
Event summary
Get ready for an exhilarating day of athleticism and community spirit at the LA Tri Series 2025, organized by Spectrum Sports Management! Mark your calendars for Saturday, October 4, 2025, as this iconic event returns to the stunning Frank G. Bonelli Regional Park in San Dimas, Los Angeles. As the longest-running triathlon series in the United States, the LA Triathlon invites athletes of all ages and skill levels to experience a thrilling combination of swimming, biking, and running against the breathtaking backdrop of the San Gabriel Mountains.
Participants can choose from three unique race distances: the Super Sprint (300m swim, 12k bike, and 5k run), the Championship Distance (1000m swim, 35k bike, and 10k run), and the Iron Bruin collegiate distance race (1000m swim, 24k bike, and 5k run), in proud partnership with UCLA Triathlon. Whether you're a first-time triathlete discovering your passion or a seasoned competitor aiming for a personal best, the LA Tri Series promises an unforgettable experience filled with excitement, camaraderie, and the chance to push your limits! Join us for a day that celebrates health, fitness, and the vibrant spirit
Participants can choose from three unique race distances: the Super Sprint (300m swim, 12k bike, and 5k run), the Championship Distance (1000m swim, 35k bike, and 10k run), and the Iron Bruin collegiate distance race (1000m swim, 24k bike, and 5k run), in proud partnership with UCLA Triathlon. Whether you're a first-time triathlete discovering your passion or a seasoned competitor aiming for a personal best, the LA Tri Series promises an unforgettable experience filled with excitement, camaraderie, and the chance to push your limits! Join us for a day that celebrates health, fitness, and the vibrant spirit
LA Tri Series 2025
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Races
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Championship Distance
1000 meter swim, 35km bike, 10k run. Only $168 until September 20th.
Entries closed$188.00
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Super Sprint
300 meter swim, 12km bike ride, 5k run. Only $128.00 until September 20th
Entries closed$148.00
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IronBruin Collegiate Distance
1000 meter swim, 24km bike, 5k run. Available to all students athletes enrolled in college or university.
Entries closed$85.00
Event information
The triathlon begins on the south shore swim beach of Bonelli Park. The event features swim distances of 1000 meters (Championship and Collegiate Distance) and 300 meters. All events use the same bike course, the difference being the number of laps. The longest bike course involves 3 laps for a total of 35k (about 20 miles). The course begins on Raging Waters Drive before crossing the Puddingstone dam onto Puddingstone drive. The course then turns onto Fairplex Drive and Via Verde before athletes continue to the transition area or additional laps. The run portion takes place entirely on footpaths within Bonelli park.
All athletes get a finisher medal, t-shirt and a great time
Parking available in Bonelli Park.
Frank G Bonelli Regional Park
Take the 210 or 10 freeway to the 57 and exit onto Via Verde.
Organiser's description
First launched in 1983, the LA Tri series is the longest-running triathlon series in the United States. Hosted at the foot of the San Gabriel mountains on the gorgeous grounds of Frank G Bonelli Regional Park, the LA Triathlon features a lake swim in the glassy waters of Puddingstone Reservoir, accelerates into a gorgeously looped bike course defined by right-hand turns and gently rolling hills and finishes with a well-shaded run along the treelined pathways of Bonelli.
The course is designed for athletes of all ages and skill levels – ideal for first-time triathletes venturing into a newfound passion and grizzled veterans chasing a personal best. On Event day we host three unique races; a Super Sprint (300m/12k/5k), Championship Distance (1000m/35k/10k) and, in proud partnership with UCLA Triathlon, the Iron Bruin collegiate distance race(1000m/24k/5k). The Iron Bruin race is open to collegiate athletes from all schools.
The course is designed for athletes of all ages and skill levels – ideal for first-time triathletes venturing into a newfound passion and grizzled veterans chasing a personal best. On Event day we host three unique races; a Super Sprint (300m/12k/5k), Championship Distance (1000m/35k/10k) and, in proud partnership with UCLA Triathlon, the Iron Bruin collegiate distance race(1000m/24k/5k). The Iron Bruin race is open to collegiate athletes from all schools.
Location
Puddingstone Lake, San Dimas, CA 91773, United States
LA Tri Series 2025
SS
Spectrum Sports Management
On Find a Race
Since
2025
Events
1
