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Duathlons 2025 - 2026 in California

Cal Tri Castaic Lake

Castaic Lagoon, United States
14 Jun, 2025 (Sat)
Duathlon
5 km
40 km
10 km
5 km
15 km
5 km
This event also offers:Running, Triathlon, Swimming, Aquabike

Tahoe Off-road Triathlon

Tahoe City, United States
21 Jun, 2025 (Sat)
Duathlon
3.2 km
22 km
8 km
This event also offers:Triathlon, Aquabike

Huntington Lake Triathlon, 5k & 10k

Lakeshore, United States
22 Jun, 2025 (Sun)
Duathlon
5.3 km
16.9 km
5.3 km
This event also offers:Running, Triathlon, Aquathlon, Aquabike

San Diego International Triathlon

San Diego, United States
22 Jun, 2025 (Sun)
Duathlon
1.6 km
20 km
6 km
This event also offers:Triathlon, Aquathlon, Aquabike

Recommended for you

TRI for FUN Triathlon #2

Herald, United States
13 Jul, 2025 (Sun)
Duathlon
1.6 km
25.7 km
4.8 km
This event also offers:Triathlon

Donner Lake Triathlon

Truckee, United States
27 Jul, 2025 (Sun)
Duathlon
3.2 km
39.9 km
10.5 km
This event also offers:Triathlon, Aquabike
Donner Lake Triathlon

Solana Beach Triathlon & Duathlon

Solana Beach, United States
27 Jul, 2025 (Sun)
Duathlon
1.6 km
16.1 km
5 km
This event also offers:Triathlon, Aquathlon, Aquabike

Tri Santa Cruz

Santa Cruz, United States
10 Aug, 2025 (Sun)
Duathlon
5 km
32.2 km
5 km
5 km
16.1 km
5 km
This event also offers:Running, Triathlon, Aquathlon, Swimming, Aquabike

CVC San Diego Triathlon

Chula Vista, United States
17 Aug, 2025 (Sun)
Duathlon
1.6 km
19 km
5 km
This event also offers:Triathlon, Aquabike

Bra Run LA, Sponsored by UCLA Health

Los Angeles, United States
24 Aug, 2025 (Sun)
Duathlon
13 km
22.5 km
5 km
22.5 km
This event also offers:Running, Cycling

This week’s best deals

Image of São Silvestre City of Porto
Up to 60% off
4

São Silvestre City of Porto

Porto, Portugal
28 Dec, 2025 (Sun)
Running
From 9 USD23 USD
Image of Half Marathon Magaluf
Up to 54% off
4.5
Map

Half Marathon Magaluf

Magaluf, Spain
18 Apr, 2026 (Sat)
Running
From 18 USD40 USD
Image of Pisa Half Marathon
Up to 50% off

Pisa Half Marathon

Pisa, Italy
12 Oct, 2025 (Sun)
Running
From 11 USD23 USD
Image of Women Run 10km Phnom Penh
Up to 50% off
4.5

Women Run 10km Phnom Penh

Phnom Penh, Cambodia
08 Mar, 2026 (Sun)
Running
From 10 USD20 USD
Image of ZAGREB21 – Zagreb Spring Half Marathon powered by heineken 0.0
Up to 50% off
4.3

ZAGREB21 – Zagreb Spring Half Marathon powered by heineken 0.0

Zagreb, Croatia
21-22 Mar, 2026 (Sat - Sun)
Running
From 17 USD29 USD
Image of Sihanoukville International Half Marathon
Up to 50% off
4.6

Sihanoukville International Half Marathon

Ochheuteal Beach, Cambodia
22 Mar, 2026 (Sun)
Running
From 10 USD20 USD
Image of Port Douglas Gran Fondo Festival
Up to 49% off

Port Douglas Gran Fondo Festival

Port Douglas, Australia
13-14 Sep, 2025 (Sat - Sun)
Cycling, Mountain biking
From 39 USD77 USD
Image of Split Marathon
Up to 47% off
4.8

Split Marathon

Split, Croatia
14-15 Feb, 2026 (Sat - Sun)
Running
From 23 USD43 USD
Image of Castellón bp Marathon
Up to 47% off
4.6

Castellón bp Marathon

Castellón de la Plana, Spain
22 Feb, 2026 (Sun)
Running
From 17 USD32 USD
Image of Timisoara 21K
Up to 46% off
5
Map

Timisoara 21K

Timișoara, Romania
08 Mar, 2026 (Sun)
Running
From 22 USD40 USD
Image of EPIC Azores by Decathlon
Up to 45% off
5
Map

EPIC Azores by Decathlon

Vila Franca do Campo, Portugal
05-06 Dec, 2025 (Fri - Sat)
Trail running
From 23 USD34 USD
Image of TotalEnergies Murcia Marathon
Up to 45% off
4.6

TotalEnergies Murcia Marathon

Murcia, Spain
01 Feb, 2026 (Sun)
Running
From 16 USD26 USD
Image of Mostar Half Marathon
Up to 45% off
5

Mostar Half Marathon

Mostar, Bosnia and Herzegovina
21 Mar, 2026 (Sat)
Running
From 32 USD58 USD
Image of Novi Sad Marathon
Up to 44% off
3.5

Novi Sad Marathon

Novi Sad, Serbia
12 Oct, 2025 (Sun)
Running, Nordic walking
From 24 USD44 USD
Image of Maga Circe Marathon
Up to 44% off
5
Map

Maga Circe Marathon

San Felice Circeo, Italy
01 Feb, 2026 (Sun)
Running, Walking
From 14 USD17 USD
Image of standard chartered Hanoi Marathon - Heritage race
Up to 44% off
4

standard chartered Hanoi Marathon - Heritage race

Hanoi, Vietnam
09 Nov, 2025 (Sun)
Running
From 24 USD40 USD
Image of Halong Bay Heritage Marathon
Up to 44% off
4.3

Halong Bay Heritage Marathon

Thành phố Hạ Long, Vietnam
23 Nov, 2025 (Sun)
Running
From 24 USD38 USD
Image of Marina Double 15K, Marina 10K, UjENA 5K
Up to 43% off

Marina Double 15K, Marina 10K, UjENA 5K

United States, United States
21 Mar, 2026 (Sat)
Trail running
From 15 USD20 USD
Image of Movistar Madrid Half Marathon
Up to 42% off
4.8
Map

Movistar Madrid Half Marathon

Madrid, Spain
22 Mar, 2026 (Sun)
Running
From 46 USD79 USD
Image of Maratona di Reggio Emilia
Up to 42% off
4.7

Maratona di Reggio Emilia

Reggio Emilia, Italy
14 Dec, 2025 (Sun)
Running
From 34 USD46 USD

Registration just opened

Image of Florida Marathon Weekend
Up to 33% off
Map

Florida Marathon Weekend

Melbourne, United States
08 Feb, 2026 (Sun)
Running
From 30 USD40 USD
Image of WVV Marathon Würzburg
Up to 15% off

WVV Marathon Würzburg

Würzburg, Germany
10 May, 2026 (Sun)
Running
From 26 USD31 USD
Image of Taipei Marathon
4.8

Taipei Marathon

Taipei City, Taiwan
21 Dec, 2025 (Sun)
Running
From 180 USD
Image of Sri Chinmoy Marathon Skopje
Up to 33% off
5

Sri Chinmoy Marathon Skopje

Skopje, North Macedonia
15 Mar, 2026 (Sun)
Running
From 23 USD34 USD
Image of Kathmandu Marathon
Up to 40% off
4

Kathmandu Marathon

Dashrath Stadium, Nepal
01 Nov, 2025 (Sat)
Running
From 35 USD50 USD
Image of Seoul 100K
4.8

Seoul 100K

Seoul Plaza, South Korea
20 Sep, 2025 (Sat)
Trail running
From 85 USD
Image of Atleticom We Run Rome
Up to 36% off
4.7

Atleticom We Run Rome

Viale delle Terme di Caracalla, Italy
31 Dec, 2025 (Wed)
Running
From 17 USD23 USD
Image of Formentera Island Triathlon
Up to 27% off

Formentera Island Triathlon

Es Pujols, Spain
04 Oct, 2025 (Sat)
Triathlon
From 31 USD42 USD
Image of X-WATERS Antalya

X-WATERS Antalya

Antalya, Turkey
02 May, 2026 (Sat)
Swimming
From 16 USD
Image of Rose of the Shires Ultra

Rose of the Shires Ultra

Brixworth, United Kingdom
11 Apr, 2026 (Sat)
Trail running
From 62 USD
Image of Seoul Race
4.9

Seoul Race

Sejong-daero, South Korea
12 Oct, 2025 (Sun)
Running
From 60 USD
Image of Mostar Half Marathon
Up to 45% off
5

Mostar Half Marathon

Mostar, Bosnia and Herzegovina
21 Mar, 2026 (Sat)
Running
From 32 USD58 USD
Image of Alexandria Marathon
5

Alexandria Marathon

Al Azaritah WA Ash Shatebi, Egypt
31 Oct, 2025 (Fri)
Running
From 10 USD
Image of Höstrusket
Up to 34% off

Höstrusket

Stockholm, Sweden
08 Nov, 2025 (Sat)
Running
From 41 USD62 USD
Image of Honolulu Marathon
Up to 21% off
4.9
Map

Honolulu Marathon

Honolulu, United States
13-14 Dec, 2025 (Sat - Sun)
Running
From 55 USD70 USD
Image of Sihanoukville International Half Marathon
Up to 50% off
4.6

Sihanoukville International Half Marathon

Ochheuteal Beach, Cambodia
22 Mar, 2026 (Sun)
Running
From 10 USD20 USD
Image of Santa Eulària Ibiza Marathon
Up to 38% off
5

Santa Eulària Ibiza Marathon

Eivissa, Spain
18 Apr, 2026 (Sat)
Running
From 29 USD46 USD
Image of Run Barbados Marathon Weekend
5

Run Barbados Marathon Weekend

Bridgetown, Barbados
05-07 Dec, 2025 (Fri - Sun)
Running, Walking
From 28 USD
Image of Giglio Island Half Marathon

Giglio Island Half Marathon

Giglio Campese, Italy
12 Oct, 2025 (Sun)
Running
From 18 USD
Image of Bitcoin Thailand Half Marathon
Up to 16% off

Bitcoin Thailand Half Marathon

Tambon Chang Phueak, Thailand
02 Nov, 2025 (Sun)
Running
From 16 USD19 USD

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