MessengerGreat Trail Serra D'Arga
Event summary
The Grande Trail da Serra D’Arga is a trail running event taking place from October 2 to 4, 2026, in the Serra d’Arga region of Portugal. It features multiple race distances including 100 km, 50 km, 31 km, 17 km, 15 km, a 12 km walk, and a kids’ trail with distances from 250 m to 2100 m.
Open to athletes aged 18 and over, the event is part of the Best Trails Series, the ATRP National Circuit 2027, and scores points for ITRA and UTMB. The courses traverse mountainous terrain with significant elevation gains, passing through preserved villages, rivers, and natural landmarks, offering a challenging and scenic experience.
The event includes a festive atmosphere with cultural performances and awards ceremonies, catering to a wide range of participants from elite trail runners to families and youth.
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Regulation link ↗
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Start/finish locations:
• GTSA 100km: Caminha (start), Dem (finish)
• GTSA 50km and GTSA 15km: Dem
• GTSA 31km, GTSA 17km, Caminhada 12km, GTSA Kids: São Lourenço da Montaria
Start times per category/distance:
• GTSA 100km: October 2, 22:00
• GTSA 50km and GTSA 15km: October 3, 08:00
• GTSA 31km: October 4, 09:00
• GTSA 17km and Caminhada 12km: October 4, 09:30
• GTSA Kids: October 4, 12:30
Cut-off times:
• GTSA 100km: 24 hours with intermediate cut-offs at km 50 (10 hours) and km 80 (19 hours)
• GTSA 50km: 14 hours with cut-off at km 31.5 (9 hours)
• GTSA 31km, 17km, and 15km: no time limits
Registration deadline: September 25, 2026
Surface types: Mountain trails with technical terrain and significant elevation changes
Course format: Circular routes for all distances
Race routes:
• GTSA 100km: Caminha, Vila Praia de Âncora, Dem, Arga de Baixo, Arga de Cima, Cerquido, Montaria, Pedrulhos, finish in Dem
• GTSA 50km: Circular route starting and finishing in Dem, passing through villages and natural landmarks
• GTSA 31km, 17km, 15km, Caminhada 12km, and Kids races: Circular routes starting and finishing in São Lourenço da Montaria
Timing method: Electronic chip timing integrated into bib
Toilets and aid station placement:
• Multiple aid stations per distance with liquids and food; athletes must carry their own hydration containers
Parking and shuttle details: Participants must arrange their own transport; transfer available for 100km participants from Dem to Caminha upon request
Drop bag policy: For GTSA 100km, drop bags accepted before start and transported to Base de Vida
Prizes: Trophies awarded for overall and age categories; team classification prizes based on top 3 athletes’ times
Location
get directionsRaces
Trail Run 100 km
Trail Run 50 km
Trail Run 31 km
Trail Run 17 km
Trail Run 15 km
Walking 12 km
Kids Trail
Benefits
🎽 Athlete kit: bib number, race-related gifts
🏅 Finisher prize: medal
⏱️ Timing + live results via chip timing
🛟 Safety support: emergency and medical teams on course
🛡️ Insurance: personal accident insurance included in registration fee
🥤 Aid stations: liquids and food at multiple points; athletes must carry their own hydration containers
🚿 Showers available after the race
🧳 Drop-bag service for 100km participants
🏆 Trophies for top finishers in general and age categories
