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Elysium Mons 29er

Elysium Mons is the largest volcano in Mars's Elysium province, the planet's second major volcanic region after Tharsis. It rises about 12.6 km from base to summit (roughly 14.1 km above the datum) and spans some 240 km across, topped by a ~14 km-wide summit caldera.
  Photos of Elysium Mons.

THEMIS view of Elysium Mons including part of the summit caldera (NASA/JPL-Caltech/ASU (THEMIS))
Elysium Mons
Quick facts
  • Largest volcano of Mars's Elysium province
  • About 240 km across with a ~14 km summit caldera
  • Anchors Mars's second-largest volcanic region
  • Flanked by Hecates Tholus and Albor Tholus
  • Steeper, more stratovolcano-like profile than the Tharsis shields