The Boruca (also known as the Brunca or the Brunka) are an indigenous people living in Costa Rica. The tribe has about 2,660 members, most of whom live on a reservation in the Puntarenas Province in southwestern Costa Rica, a few miles away from the Pan-American Highway where it follows the Rio Terraba. The ancestors of the modern Boruca made up a group of chiefdoms that ruled most of Costa Rica's Pacific coast, from Quepos to what is now the Panamanian border, including the Osa Peninsula. Boruca traditionally spoke the Boruca language, which is now nearly extinct.