The Grande Trail Serra d'Arga is organized by Carlos Sá Nature Events®. It has also the support of the Municipal Chambers of Caminha and Viana do Castelo and the support of Dem, São Lourenço da Montaria, Estorãos, Arga de São João, Arga de Cima and Arga de Baixo, Amonde, Gondar e Orbacém.
Races:
On the 20th September will take place the GTSA Vertical. This race has a distance of 4 km and 800 m D+; it starts at 10:00 am in Estorãos (Ponte de Lima) and finishes in the top of Senhora do Minho.

On the 25th September will take place the GTSA Sunset Adventure 15 km. With a distance of 15 km/800 D+, GTSA Sunset will pass through Santa Tecla Mount, where they will be able to watch one of the best sunsets in the world. In the final stage of the race, participants will cross the Minho River by kayak, finishing at Caminha town centre.

On the 26th September, it will take place the Main race of the event: the GTSA Ultra Trail 43 km. This race starts and finishes in Dem and it has a distance of 43 km and a D+ of 2500 m.This fantastic race passes through many preserved historic villages such as Mosteiro S. João de Arga, Arga de Baixo, Arga de Cima, Cerquido, S. Lourenço da Montaria (and its fantastic river, Âncora) and Dem, belonging to three different municipalities: Caminha, Ponte de Lima and Viana do Castelo.

On the 27th September two competitive races will take place simultaneously:  Long Trail 25 km and Short Trail/hike 15 km. It will be also held the GTSA Kids. All these activities start and finish in S. Lourenço da Montaria.
Long Trail 25 km and Short Trail/Hike 15 km – It starts at 09:00 am. With a D+ of 2200m and 1050m respectively, it starts in the Village of S. Lourenço da Montaria, crossing trails of the Serra d'Arga with passage through the fantastic river Âncora and finishing at S. Lourenço da Montaria.