Log In 

Olympus Mons 29er

Olympus Mons is the tallest mountain and largest volcano in the solar system. This colossal shield volcano on the Tharsis rise of Mars stands about 69,840' above the Martian datum and rises as much as ~85,000' (26 km) from the plains at its base — roughly two and a half times the height of Mount Everest above sea level.
  Photos of Olympus Mons.

Olympus Mons from orbit, the six-caldera summit complex visible at center (NASA/JPL (Viking 1 orbiter mosaic))
Olympus Mons
The shield and its aureole; the volcano spans ~600 km, the size of Arizona (NASA/JPL/MSSS (Mars Global Surveyor))
Olympus Mons
Quick facts
  • Tallest mountain and largest volcano in the solar system
  • About 600 km (370 mi) across — the size of Arizona
  • Summit caldera complex: six nested craters, 60×80 km, up to 3.2 km deep
  • Ringed by a basal escarpment up to 8 km (5 mi) tall
  • Summit air pressure ~72 Pa, about 12% of Mars's average