in General Knowledge Mars has the tallest known mountain on a planet of our Solar System, with a height of 22 km (14 mi) by Web Desk June 16, 2016, 2:11 pm 301 Views Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website By using this form you agree with the storage and handling of your data by this website. *