Lars Lake

Lars Lake is a location seen briefly in the Dragons: Race to the Edge, Season 4 episode, "Dire Straits".

Geography
Lars Lake is a body of presumably fresh water, located on the Isle of Berk. It appears to have some depth to it, based on Hiccup's Diving Bell testing there. The lake appears to be surrounded by rocky cliffs, but does have at least one small sandy beach area.

Dragons: Race to the Edge, Season 4
In the episode, "Dire Straits", Hiccup and the Dragon Riders go to Berk because of a famine affecting the people. No traders are coming through the Straits of Baldur because the Dragon Hunters chained a Submaripper there. In order to stay under water to try and free the Submaripper, Hiccup and Fishlegs concoct a Diving Bell device in Gobber's blacksmith shop with a small window port of Death Song Amber and test it at Lars Lake. The first test showed that one layer of amber was not enough to withstand the pressure of the water.