Grande Trail Serra d'Arga

About the Event

Answer the wild call of Northern Portugal’s most iconic mountain range at the Grande Trail Serra d'Arga (GTSA). This premier trail running festival, set against the breathtaking backdrop of the Serra d'Arga from 2nd to 4th October 2026, offers a transformative distance for every ambition. Conquer the legendary GTSA 100KM under a cloak of stars starting in Caminha on October 2nd, or embrace the epic GTSA 50KM journey from Dem at dawn on October 3rd. For those seeking a powerful one-day mountain test, the GTSA 31KM awaits in São Lourenço da Montaria on October 4th, while the vibrant GTSA 17KM provides a stunning gateway to the trails on the same morning. Beyond the runs, immerse yourself in authentic local culture, from folk music to ancient villages, across a meticulously organized weekend that connects runners directly to the soul of the landscape. This is more than a series of races—it's a complete immersion into the rugged beauty, community spirit, and unforgettable challenges of Portugal's verdant north.

Races Offered

100 km

Sep 26, 2025

straighten

Distance — 100K

terrain

Type — —

timer

22:00

50 km

Sep 27, 2025

straighten

Distance — 50K

terrain

Type — —

timer

08:00

17 km

Sep 27, 2025

straighten

Distance — 17K

terrain

Type — —

timer

09:30

15 km

Sep 28, 2025

straighten

Distance — 15K

terrain

Type — —

timer

08:00

31 km

Sep 28, 2025

straighten

Distance — 31K

terrain

Type — —

timer

09:00

Weather History

These values represent the 3-year monthly averages for October in Caminha.

thermostat Temperature

15.6° / 19.0°

wb_sunny Feels like

13.4° / 18.1°

light_mode Avg sunshine hours

7h 4m

water_drop Avg rainfall

9.4 mm

ac_unit Avg snowfall

—

air Avg wind speed

16.2 km/h (Gentle breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (4.0)

humidity_mid Humidity

83.7%

wb_twilight Sunrise

07:48

nightlight Sunset

18:52

About Caminha

Learn more about the host city, Caminha.

Caminha is a town facing the estuary of Minho and close to the Atlantic Ocean in Northern Portugal. The town is on the coastal section of the Portuguese Way. It is a popular place for second homes and as a summer resort.