Limits RegistryPUBLIC RECORD
Limits RegistryOlympus Mons, a shield volcano on Mars, rises about 21.9 km from its base — roughly two and a half times the height of Mount Everest above sea level — and spans about 600 km across at its base, making it the tallest known mountain in the solar system. It could form so large partly because Mars lacks plate tectonics, letting lava build up in one place over hundreds of millions of years instead of the crust shifting the hotspot away, as on Earth (compare Earth's Tamu Massif, which is far larger by footprint but much shorter in height).
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Olympus Mons, a shield volcano on Mars, rises about 21.9 km from its base — roughly two and a half times the height of Mount Everest above sea level — and spans about 600 km across at its base, making it the tallest known mountain in the solar system. It could form so large partly because Mars lacks plate tectonics, letting lava build up in one place over hundreds of millions of years instead of the crust shifting the hotspot away, as on Earth (compare Earth's Tamu Massif, which is far larger by footprint but much shorter in height).
The greatest base-to-summit height of any known mountain or volcanic edifice in the solar system, on any planet or moon.
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1 accepted Claim, with 1 linked evidence records.
Permanent ID limitsregistry.com/limits/LR-TALLEST-VOLCANO-SOLAR-SYSTEM
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Limits Registry. LR-TALLEST-VOLCANO-SOLAR-SYSTEM. Tallest known mountain in the solar system. 2026.