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Trail running races 2025 - 2026: half marathons en Colorado

Boulder Rez Half Marathon

Boulder Reservoir, Boulder, USA
12 Apr, 2025 (Sat)
Trail running
21.097 km, 21.1 km +2 more

Desert R.A.T.S. Trail Running Festival

Fruita, USA
13 Apr, 2025 (Sun)
Trail running
21.097 km +3 more
Map
Desert R.A.T.S. Trail Running Festival

Desert R.A.T.S. Trail Running Festival

Fruita, USA
13 Apr, 2025 (Sun)
Trail running
21.097 km +3 more
Map
Desert R.A.T.S. Trail Running Festival

All-Out Beat the Heat 1M, 5K, 10K, Half Marathon & Marathon

Westminster, USA
19 Apr, 2025 (Sat)
Trail running
13.1 mi +2 more
All-Out Beat the Heat 1M, 5K, 10K, Half Marathon & Marathon

Recommended for you

Great Western Trail Race - CO

Severance, USA
19 Apr, 2025 (Sat)
Trail running
13.1 mi +3 more

Falcon 50

Colorado Springs, USA
03 May, 2025 (Sat)
Trail running
21.1 km +2 more

Mountain Ridge 21M, Half Marathon and 10K & 5K - CO

Highlands Ranch, USA
10 May, 2025 (Sat)
Trail running
21.1 km +3 more

Valkyrie Trail Race

Colorado Springs, USA
10 May, 2025 (Sat)
Trail running
21.1 km +5 more

Fruita Trail Half

Fruita, USA
11 May, 2025 (Sun)
Trail running
21.097 km

All-Out Summer Breeze

Arvada, USA
07 Jun, 2025 (Sat)
Trail running
13.1 mi +2 more

This week’s best deals

Image of Halong Bay Heritage Marathon
Up to 65% off
4.4

Halong Bay Heritage Marathon

Thành phố Hạ Long, Vietnam
23 Nov, 2025 (Sun)
Running
From 16 USD38 USD
Image of Can Tho Heritage Marathon
Up to 65% off
4.5

Can Tho Heritage Marathon

Vietnam, Vietnam
21 Dec, 2025 (Sun)
Running
From 16 USD40 USD
Image of Ultra Maratona Atlântica
Up to 60% off
5

Ultra Maratona Atlântica

Melides, Portugal
27 Jul, 2025 (Sun)
Trail running
From 11 USD28 USD
Image of Maga Circe Marathon
Up to 55% off
5
Map

Maga Circe Marathon

San Felice Circeo, Italy
01 Feb, 2026 (Sun)
Running, Walking
From 14 USD17 USD
Image of Timisoara 21K
Up to 54% off
5
Map

Timisoara 21K

Timișoara, Romania
08 Mar, 2026 (Sun)
Running
From 18 USD39 USD
Image of VnExpress Marathon Sparkling Quy Nhon
Up to 51% off
5

VnExpress Marathon Sparkling Quy Nhon

Qui Nhơn, Vietnam
15 Jun, 2025 (Sun)
Running
From 16 USD33 USD
Image of Apfel Arena Makarska Half Marathon
Up to 50% off

Apfel Arena Makarska Half Marathon

Makarska, Croatia
25-26 Oct, 2025 (Sat - Sun)
Running
From 24 USD41 USD
Image of Narva Energy Run
Up to 50% off

Narva Energy Run

Narva, Estonia
28-29 Jun, 2025 (Sat - Sun)
Running
From 6 USD11 USD
Image of Trakai Triathlon
Up to 50% off

Trakai Triathlon

Trakai, Lithuania
29 Jun, 2025 (Sun)
Triathlon
From 28 USD55 USD
Image of Hyundai Porto Half Marathon
Up to 50% off
4.6

Hyundai Porto Half Marathon

Porto, Portugal
14 Sep, 2025 (Sun)
Running
From 11 USD17 USD
Image of Ostrava City Marathon
Up to 50% off
1

Ostrava City Marathon

Ostrava, Czech Republic
14 Sep, 2025 (Sun)
Running
From 7 USD11 USD
Image of Pula Marathon
Up to 50% off
5
Map

Pula Marathon

Pula, Croatia
20 Sep, 2025 (Sat)
Nordic walking, Running
From 11 USD22 USD
Image of Sierra Blanca Estates Marbella Half Marathon
Up to 50% off
5
Map

Sierra Blanca Estates Marbella Half Marathon

Marbella, Spain
28 Sep, 2025 (Sun)
Running
From 17 USD
Image of Pisa Half Marathon
Up to 50% off

Pisa Half Marathon

Pisa, Italy
12 Oct, 2025 (Sun)
Running
From 11 USD22 USD
Image of Garda Trentino Half Marathon
Up to 50% off
4.8

Garda Trentino Half Marathon

Riva del Garda, Italy
09 Nov, 2025 (Sun)
Running
From 14 USD
Image of Palermo Marathon and Half Marathon
Up to 50% off
4.5

Palermo Marathon and Half Marathon

Palermo, Italy
16 Nov, 2025 (Sun)
Running
From 22 USD44 USD
Image of Sarajevo Half Marathon
Up to 49% off
4.3

Sarajevo Half Marathon

Sarajevo, Bosnia and Herzegovina
21 Sep, 2025 (Sun)
Running
From 29 USD56 USD
Image of XI Stellantis&you port de palma triathlon mallorca
Up to 47% off
5

XI Stellantis&you port de palma triathlon mallorca

Palma, Spain
21 Sep, 2025 (Sun)
Triathlon
From 24 USD46 USD
Image of Murcia Marathon
Up to 45% off
4.6

Murcia Marathon

Murcia, Spain
01 Feb, 2026 (Sun)
Running
From 16 USD25 USD
Image of Mekong Delta Marathon Hau Giang
Up to 44% off

Mekong Delta Marathon Hau Giang

Vi Thanh, Vietnam
06 Jul, 2025 (Sun)
Running
From 22 USD39 USD

Registration just opened

Image of Nature Marathon Tessenderlo
Up to 27% off
4

Nature Marathon Tessenderlo

Tessenderlo, Belgium
18 Oct, 2025 (Sat)
Trail running
From 30 USD41 USD
Image of Half Marathon Almada
Up to 19% off

Half Marathon Almada

Almada, Portugal
06 Apr, 2025 (Sun)
Running, Walking
From 5 USD6 USD
Image of Kao Pratubchang Trail

Kao Pratubchang Trail

Hin Kong, Thailand
14-15 Jun, 2025 (Sat - Sun)
Trail running
From 12 USD
Image of TRITON World Finals - Portimão

TRITON World Finals - Portimão

Portimão, Portugal
24 Oct, 2025 (Fri)
Triathlon
From 300 USD
Image of Dune Marathon - Run in the desert
Up to 14% off
5

Dune Marathon - Run in the desert

Merzouga, Morocco
22 Feb, 2026 (Sun)
Running, Trail running
From 31 USD
Image of Zurich San Sebastián Marathon
4.8

Zurich San Sebastián Marathon

Donostia - San Sebastian, Spain
23 Nov, 2025 (Sun)
Running
From 23 USD
Image of VnExpress Marathon Sparkling Quy Nhon
Up to 51% off
5

VnExpress Marathon Sparkling Quy Nhon

Qui Nhơn, Vietnam
15 Jun, 2025 (Sun)
Running
From 16 USD33 USD
Image of Marmaris Ultra

Marmaris Ultra

Marmaris, Turkey
15-16 Nov, 2025 (Sat - Sun)
Trail running
From 44 USD
Image of Run For Pompey - Exuma Half Marathon

Run For Pompey - Exuma Half Marathon

Exuma, Bahamas
15 Nov, 2025 (Sat)
Running
From 25 USD
Image of Timisoara 21K
Up to 54% off
5
Map

Timisoara 21K

Timișoara, Romania
08 Mar, 2026 (Sun)
Running
From 18 USD39 USD
Image of Formentera to Run

Formentera to Run

El Pilar de la Mola, Spain
01 Jun, 2025 (Sun)
Running
From 326 USD
Image of Run Snetterton 10K and 5K

Run Snetterton 10K and 5K

Snetterton, United Kingdom
30 Jul, 2025 (Wed)
Running
From 25 USD
Image of Scenic Half Marathon Krabi
Up to 21% off

Scenic Half Marathon Krabi

Ao Nang, Thailand
06-07 Sep, 2025 (Sat - Sun)
Running
From 17 USD20 USD
Image of Apfel Arena Makarska Half Marathon
Up to 50% off

Apfel Arena Makarska Half Marathon

Makarska, Croatia
25-26 Oct, 2025 (Sat - Sun)
Running
From 24 USD41 USD
Image of X-WATERS Thailand

X-WATERS Thailand

Karon Beach, Thailand
16 Feb, 2026 (Mon)
Swimming
From 21 USD
Image of Watersons Hale 10K & Ashley Hall 3K

Watersons Hale 10K & Ashley Hall 3K

Ashley, United Kingdom
15 Feb, 2026 (Sun)
Running
From 16 USD
Image of The Winter GMU

The Winter GMU

Bristol, United Kingdom
07 Mar, 2026 (Sat)
Running
From 104 USD
Image of Maga Circe Marathon
Up to 55% off
5
Map

Maga Circe Marathon

San Felice Circeo, Italy
01 Feb, 2026 (Sun)
Running, Walking
From 14 USD17 USD
Image of Corrida Porto de Leixões
Up to 30% off
4

Corrida Porto de Leixões

Matosinhos, Portugal
21 Sep, 2025 (Sun)
Running
From 8 USD11 USD
Image of Kapong Trail PhangNga The Grand Canyon
Up to 19% off

Kapong Trail PhangNga The Grand Canyon

Kapong, Thailand
07-08 Jun, 2025 (Sat - Sun)
Trail running
From 30 USD36 USD

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