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Isla Mocha

An island off Arauco with a forest reserve on its spine, and a white whale in its name.

Updated 19 October 2026

Typeisland
WhereBiobio Region
Nearest cityTirua about 35 km by sea; flights from Tirua and Concepcion
Best seasonDecember to March
Time to allowSeveral days
Getting thereSmall aircraft from Tirua or Concepcion; boats are irregular
EntryReserve entry

Isla Mocha lies about thirty-five kilometres off the Arauco coast, with a ridge of old forest along its spine protected as a national reserve since 1988 and a population of a few hundred living on the flat ground around it. The forest holds pink-footed shearwaters, which breed in burrows here and on only two other islands in the world. The island's other claim is literary: Mocha Dick, an aggressive white sperm whale repeatedly encountered off this coast in the early nineteenth century and described in an 1839 magazine article by Jeremiah Reynolds, is generally taken as one of the sources Melville drew on for Moby-Dick.

History

The island was home to the Lafkenche Mapuche, and in Mapuche belief the souls of the dead travel west to it. Juan Bautista Pastene was the first European to record it, on 10 September 1544, naming it San Nicolás de Tolentino; in 1614 the Dutch captain Joris van Spilbergen saw islanders ploughing with chilihueques, a native camelid, and Dutch and English ships, Francis Drake's and Olivier van Noort's among them, used it as a supply stop. In 1685 Governor José de Garro moved its Mapuche people to the mainland, to the valley of Mocha where Concepción now stands, and in May 1839 Jeremiah N. Reynolds published "Mocha Dick: Or The White Whale of the Pacific" in The Knickerbocker, one of the inspirations for Melville's Moby-Dick (Wikipedia, Mocha Island).

The landscape

  • A forest reserve on the spine - protected since 1988.
  • Pink-footed shearwaters - breeding on one of only three islands.
  • Mocha Dick - the white whale of this coast, and Melville's source.
  • A few hundred residents - farming the flat ground around the ridge.

When to go

December to March. Several days, given the transport.

Good to know

Flights are in very small aircraft and cancel for weather; boats are irregular. Accommodation is a handful of family lodgings. There is no bank or reliable shop. Getting stuck for days is possible.

Nearby

Tirua is on the mainland; Canete and Lanalhue are inland.

Key facts

Area48 km² (19 sq mi)
Length14 km (8.7 mi)
Location38.3650° S, 73.9150° W · map

Source: Wikidata, item Q1635008, read on 18 October 2026.

What to pack for Isla Mocha

Chosen from what this place is for. Tap a kit for the full checklist.

  • Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
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  • A zoom camera or long lens - Animals rarely come close; reach beats megapixels. Find on Amazon

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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.

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