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Leatherback turtles (Dermochelys coriacea) are critically endangered and have been rapidly declining in the Pacific Ocean. There are two populations in the Pacific, and our study is the first to combine satellite telemetry data from both populations. This resulted in the analysis of 135 individual tracks, the largest leatherback data set ever assembled. We identified distinct migration and foraging patterns. Leatherbacks from the West Pacific migrated to multiple foraging grounds, whereas those from the East Pacific had a more limited distribution in the southeast Pacific. This will affect their vulnerability to being caught in fisheries, a major cause of mortality.