Lagoa Grande do Buriti dos Lopes is a notable lagoon located near the municipality of Buriti dos Lopes in the state of Piauí, Brazil. The water body is associated with a dam structure — the Barragem da Lagoa Grande de Buriti dos Lopes — which plays a role in regulating water levels and has made the lagoon a recognized landmark in the region. Situated within the broader network of lakes, rivers, and waterways that characterize this part of northeastern Brazil, the lagoon sits approximately 4.6 kilometers from the town of Buriti dos Lopes and is part of a rich aquatic landscape that includes the Rio Longá, numerous smaller lagoons, and interconnected riachos. The area is also known as a venue for traditional canoe regattas, reflecting the deep cultural connection local communities have with this water body.