Brenton Loch, Sea inlet and fjord in East Falkland, United Kingdom.

This narrow sea inlet runs between steep rock walls separating the Lafonia peninsula from northern East Falkland. The waterway connects to Grantham Sound at its mouth and runs near the isthmus linking Darwin and Goose Green settlements. Surrounding cliffs form a natural barrier between the island's geographic regions, with the inlet providing sheltered waters that extend inland from the Atlantic coast.

In 1846 Samuel Lafone set up Hope Place on the southern shore, settled mainly by gauchos from the Río de la Plata; the site is now abandoned. In 1976 pilot Ian Campbell drowned when his Beaver floatplane crashed into the loch. During the 1982 Falklands War, HMS Arrow anchored here and gave covering fire for the Battle of Goose Green.

The name may come from the many Scots living at Goose Green in the 19th century. In English, "loch" is pronounced "lock", without the Scottish fricative "ch". The southern end is called "La Boca" or "The Boca", and the Spanish name honours Felipe Ruiz Puente, the islands' first Spanish military administrator from 1767 to 1773.

Access is via unpaved roads from nearby Darwin and Goose Green settlements, located roughly 60 miles (100 kilometers) west of capital Stanley. The area is best visited from November through March when Falklands weather conditions are most stable. Accommodation is available in the mentioned settlements, and visitors should bring warm, weatherproof clothing for the region's strong winds. Advance planning is recommended as visitor facilities are limited in this remote section of the archipelago.

The waters host diverse seabird populations including black-browed albatrosses and imperial cormorants nesting on cliffs along the shores. Leopard seals and orcas occasionally visit the inlet while hunting, particularly during penguin breeding seasons at surrounding colonies. Marine archaeologists continue surveying the seabed for artifacts from the 1982 conflict, documenting the region's military history through remnants that remain in the protected waters where naval vessels operated during the war.