What is the highest peak and longest river in Antarctica?

The Vinson Massif, located in the Sentinel Range of the Ellsworth Mountains, is the highest peak in Antarctica. It has an elevation of 4,892 meters (16,050 feet). The Onyx River, located in Wright Valley in Victoria Land, is the longest river in Antarctica. It flows for approximately 30 kilometers (19 miles) before entering Lake Vanda.