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
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Distance —
100K
terrain
Type —
Running
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22:00
50 km
Sep 27, 2025
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Distance —
50K
terrain
Type —
Running
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08:00
17 km
Sep 27, 2025
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Distance —
17K
terrain
Type —
Running
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09:30
15 km
Sep 28, 2025
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Distance —
15K
terrain
Type —
Running
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08:00
31 km
Sep 28, 2025
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Distance —
31K
terrain
Type —
Running
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09:00
Weather History
These values represent the 3-year monthly averages for October in Caminha.
thermostatTemperature
15.6° / 19.0°
wb_sunnyFeels 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.
