Only six beaches of the Galapagos National Park were allowed to open for three-hour stretches.
The archipelago, with about 30,000 inhabitants, has recorded just 100 COVID-19 infections.
Mainland Ecuador has recorded 68,500 cases and more than 5,000 deaths, with authorities reporting 3,277 other deaths were likely from the virus as well.
The Galapagos Islands, located in the Pacific Ocean about 1,000 kilometers (620 miles) off the coast of Ecuador, were made famous by 19th-century English naturalist Charles Darwin’s studies of their breathtaking biodiversity.
The archipelago received 271,200 visitors in 2019.