Rendering of Mars Hill in Death Valley National Park

This rendering was created by research drones flying over Mars Hill, a region of Death Valley National Park that has been used by NASA’s Mars researchers since the 1970s, when the agency was preparing to land the twin Viking spacecraft. The hill’s rubbly, volcanic rock resembles the kind of inhospitable terrain that Mars rovers must navigate around and which posed a landing hazard for the Ingenuity Mars Helicopter. In September 2025, researchers from NASA’s Jet Propulsion Laboratory in Southern California flew research drones over Mars Hill as part of a test campaign to develop navigation software for future Mars rotorcraft. Being able to precisely land between rocks like those seen here is a critical capability to access similar Martian terrain in the future.