Thor's Beach is a section of shoreline on the Isle of Berk. It is sandy but has many large boulders sunk into it. It is flanked by a very tall and sheer rocky cliff, which is the only way to reach the beach on foot. There is a small foot path carved into the cliff.
In "Alvin and the Outcasts", the villagers have lost their weapons and Alvin the Treacherous is invading Berk. Chief Stoick orders Mulch and Bucket to take the majority of the populace to seek refuge at Thor's Beach, while he and other able-bodied villagers take to the forest to fight the enemy. Unfortunately, Bucket is caught by Alvin and forces him to lead him to the people, where he holds them hostage at spear-point and seeks information about the 'Dragon Conquerer'.