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Duathlons 2025 - 2026 in Colorado

Pagosa Duathlon

Archuleta County, United States
12 Jul, 2025 (Sat)
Duathlon
4.8 km
12.9 km
11.3 km
24.1 km

Boulder Peak Triathlon

Boulder, United States
13 Jul, 2025 (Sun)
Duathlon
5 km
39.9 km
10 km
This event also offers:Triathlon, Aquabike

Race in the Clouds - Festival 5K

Alma, United States
19 Jul, 2025 (Sat)
Duathlon
6.4 km
20.9 km
This event also offers:Mountain biking, Trail running

Stagecoach Gravel Triathlon

Oak Creek, United States
03 Aug, 2025 (Sun)
Duathlon
3.2 km
27.4 km
6.4 km
This event also offers:Triathlon, Standup paddling, Aquabike

Recommended for you

Last Call Triathlon

Loveland, United States
28 Sep, 2025 (Sun)
Duathlon
3.4 km
16.1 km
5 km
This event also offers:Triathlon, Aquathlon

Dua it for Lisa Duathlon

Pueblo, United States
30 Aug, 2024 (Fri)
Duathlon
20 km
30 km
10 km

SheSprints - Women's Duathlon & Triathlon

Aurora, United States
07 Sep, 2024 (Sat)
Duathlon
1.6 km
1.6 km
5 km
5 km
33.8 km
5 km
This event also offers:Triathlon

The Sunlight Showdown

Glenwood Springs, United States
21 Sep, 2024 (Sat)
Duathlon
20.9 km
20.9 km
20.9 km
This event also offers:Mountain biking, Trail running

Chilly Cheeks Duathlon - CO

Englewood, United States
22 Feb, 2025 (Sat)
Duathlon
4 km
17.4 km
4 km

Colorado Triathlon

Boulder, United States
07 Jun, 2025 (Sat)
Duathlon
5 km
37.8 km
10 km
This event also offers:Triathlon, Aquabike

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
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Up to 50% off

Pisa Half Marathon

Pisa, Italy
12 Oct, 2025 (Sun)
Running
From 12 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 USD44 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 USD41 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 USD35 USD
Image of TotalEnergies Murcia Marathon
Up to 45% off
4.6

TotalEnergies Murcia Marathon

Murcia, Spain
01 Feb, 2026 (Sun)
Running
From 16 USD27 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 USD59 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 25 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 USD80 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 35 USD46 USD

Registration just opened

Image of Pisa Marathon
Up to 29% off
4.4

Pisa Marathon

Pisa, Italy
21 Dec, 2025 (Sun)
Running
From 12 USD
Image of Big Bear's Ultra
Up to 9% off
Map

Big Bear's Ultra

Žilina, Slovakia
20 Sep, 2025 (Sat)
Trail running
From 55 USD61 USD
Image of Burrator 10K
Up to 10% off

Burrator 10K

Devon, United Kingdom
30 May, 2026 (Sat)
Running
From 12 USD
Image of Alexander the Great Marathon
4.4

Alexander the Great Marathon

Thessaloniki, Greece
26 Apr, 2026 (Sun)
Running
From 23 USD
Image of Challenge Barcelona Triathlon
5

Challenge Barcelona Triathlon

Barcelona, Spain
25-26 Oct, 2025 (Sat - Sun)
Swimming, Triathlon, Aquathlon
From 25 USD
Image of Bugyly Trail

Bugyly Trail

Karkaraly, Kazakhstan
19-20 Jul, 2025 (Sat - Sun)
Trail running
From 10 USD
Image of KPMG Lentemarathon Amstelveen
Up to 25% off
4.4

KPMG Lentemarathon Amstelveen

Amstelveen, Netherlands
15 Mar, 2026 (Sun)
Running
From 26 USD35 USD
Image of Metropolitan Sky Run - Barcelona
Up to 15% off

Metropolitan Sky Run - Barcelona

Barcelona, Spain
18 Oct, 2025 (Sat)
Running
From 33 USD39 USD
Image of Endless Shore Ultra Trail
Up to 13% off
Map

Endless Shore Ultra Trail

Hellvik, Norway
23 May, 2026 (Sat)
Trail running
From 141 USD161 USD
Image of McGrath Launceston Running Festival
Up to 36% off

McGrath Launceston Running Festival

Launceston, Australia
31 May, 2026 (Sun)
Running
From 7 USD10 USD
Image of Norwegian Mountain Marathon
Up to 14% off

Norwegian Mountain Marathon

Beitostølen, Norway
06 Jun, 2026 (Sat)
Running
From 23 USD
Image of Vienna City Marathon
4.1
Map

Vienna City Marathon

Vienna, Austria
18-19 Apr, 2026 (Sat - Sun)
Running
From 133 USD
Image of The Drop - Nottingham

The Drop - Nottingham

Up & Running, United Kingdom
28 Feb, 2026 (Sat)
Running
From 61 USD
Image of The Drop - London

The Drop - London

Buddy's Cafe, United Kingdom
01 Mar, 2026 (Sun)
Running
From 74 USD
Image of The Drop - Edinburgh

The Drop - Edinburgh

Conference Square, United Kingdom
04 Apr, 2026 (Sat)
Trail running
From 61 USD
Image of The Drop - Winchester

The Drop - Winchester

Winchester, United Kingdom
26 Apr, 2026 (Sun)
Running
From 70 USD
Image of The Drop - York

The Drop - York

Up & Running York, United Kingdom
10 May, 2026 (Sun)
Trail running
From 61 USD
Image of The Drop - Liverpool

The Drop - Liverpool

Salthouse Dock, United Kingdom
13 Jun, 2026 (Sat)
Running
From 61 USD
Image of Chiang Mai Marathon
Up to 37% off
4.3

Chiang Mai Marathon

Chiang Mai City, Thailand
21 Dec, 2025 (Sun)
Running
From 16 USD22 USD
Image of Zakynthos Island Half Marathon - ZanteRun
5

Zakynthos Island Half Marathon - ZanteRun

Zakinthos, Greece
11 Oct, 2025 (Sat)
Running
From 17 USD

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