Vasco Núñez de Balboa
Balboa's expedition sights the South Sea from the Isthmus of Panama
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Original prompt & settings (JSON) ↗Balboa saw the sea from a hill but did not touch it that day. Four days later he reached the beach at low tide and had to wait for the ocean to come to him.
A hill in the Chucunaque highlands, 25 September 1513
On the traditionally accepted date of 25 September 1513, Vasco Núñez de Balboa's expedition reached a hill in the Chucunaque highlands from which an immense body of water could be seen to the south.
Balboa went ahead to the summit, saw the water, and then called his companions forward. The party gave thanks and began preparing to descend toward the coast.
They called it the Mar del Sur — the South Sea — because it lay southward from their position on the isthmus. The name Pacific came later, from Magellan's voyage.
The expedition already knew the sea was there
Indigenous informants had told Balboa of another sea and of wealthy lands farther south. Worried about his political position and hoping for gold, pearls and a route toward Asian spices, he organized the crossing with Spanish and Indigenous participants.
Indigenous guides, warriors and porters supplied route knowledge and labour for the crossing. Indigenous peoples had lived beside the ocean and travelled on it long before this expedition arrived at the hill.
The ceremony came four days later
Balboa did not reach the shore or perform the well-known act of possession on this date. That happened on 29 September at the Gulf of San Miguel, where he waded in with 26 men and the notary Andrés de Valderrábano recorded the claim for the Castilian Crown.
Alonso Martín de Don Benito reached the beach ahead of Balboa and is reported to have been the first European in the expedition to enter the water, using a canoe.
Even 25 September is not fully secure. Smithsonian's review notes that the expedition's travel records can instead yield 27 September.
Sources
Researched 23 Aug 2026 4 sources not yet audited Date disputed
How this was checked
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Date disputed. Sources disagree about when this happened.
What the sources leave uncertain
- The traditional date is 25 September, supported by several historical accounts and commemorations, but Smithsonian's review notes that the expedition's travel records can instead yield 27 September.
- Balboa's status as the first European to view the Pacific from the Americas is the standard documented attribution, not proof that no unrecorded European sighting occurred.
- The exact hill has not been securely identified, and no contemporary monument fixes the spot.