Limits RegistryPUBLIC RECORD
Limits RegistryThe Mid-Ocean Ridge, an underwater volcanic mountain range running through every ocean basin, stretches approximately 65,000 km — over nine times the length of the Andes (~7,000 km), the longest range above water. Most of it lies 1.5–3 km beneath the ocean surface and was fully mapped only in the mid-20th century, which is why the Andes is still the popular answer to 'longest mountain range' despite being far shorter overall.
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The Mid-Ocean Ridge, an underwater volcanic mountain range running through every ocean basin, stretches approximately 65,000 km — over nine times the length of the Andes (~7,000 km), the longest range above water. Most of it lies 1.5–3 km beneath the ocean surface and was fully mapped only in the mid-20th century, which is why the Andes is still the popular answer to 'longest mountain range' despite being far shorter overall.
The greatest length of any continuous mountain range on Earth, including underwater ranges.
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Limits Registry. LR-LONGEST-MOUNTAIN-RANGE. Longest mountain range. 2026.