BIGGEST MOUNTAIN IN OUR SOLAR SYSTEM IS ON MARS. OLYMPUS MONS IA THE GIANT MOUNTAIN OF RED DIRT AND ROCK ON MASS, IT IS 2400 METRES OR 80,000 FEET TALL (AROUND 15 KM).  MOUNT EVEREST IS LESS THAN 10 KM HIGH

BIGGEST MOUNTAIN IN OUR SOLAR SYSTEM IS ON MARS. OLYMPUS MONS IA THE GIANT MOUNTAIN OF RED DIRT AND ROCK ON MASS, IT IS 2400 METRES OR 80,000 FEET TALL (AROUND 15 KM). MOUNT EVEREST IS LESS THAN 10 KM HIGH