29er Routes

Every standard route to the summit of the solar system’s 29ers, ranked by height. Difficulty uses our extended class system — where Class 6 means “spacecraft and pressure suit required.” Recorded ascents: still zero.

Route	Peak	Body	Difficulty	Vertical relief	Ascents
Standard Route	Olympus Mons	Mars	Class 6	72,000 ft	0
Standard Route	Rheasilvia	Vesta (asteroid)	Class 6	72,000 ft	0
Standard Route	Equatorial Ridge of Iapetus	Iapetus (moon of Saturn)	Class 6	65,600 ft	0
Standard Route	Boösaule Montes	Io (moon of Jupiter)	Class 6	59,700 ft	0
Standard Route	Ascraeus Mons	Mars	Class 6	49,000 ft	0
Standard Route	Ionian Mons	Io (moon of Jupiter)	Class 6	41,700 ft	0
Standard Route	Elysium Mons	Mars	Class 6	41,000 ft	0
Standard Route	Arsia Mons	Mars	Class 6	38,400 ft	0
Standard Route	Maxwell Montes	Venus	Class 6	36,000 ft	0
Standard Route	Euboea Montes	Io (moon of Jupiter)	Class 6	34,400 ft	0
Summit Road	Mauna Kea	Earth	Class 1	33,500 ft	0
Mauna Loa Observatory Trail	Mauna Loa	Earth	Class 2	30,085 ft	0
South Col (Nepal)	Mount Everest	Earth	Class 3	29,032 ft^*	0