In which Martian region did NASA’s Mars Pathfinder land in 1997?

NASA’s Mars Pathfinder landed in Ares Vallis on July 4, 1997.

Ares Vallis is a large ancient outflow channel system in Mars’s northern lowlands. Mission planners selected the site because its relatively smooth terrain was considered suitable for Pathfinder’s airbag landing system. The landing occurred in the Chryse Planitia region, but Ares Vallis is the more specific name associated with the landing site.

Pathfinder deployed the small Sojourner rover, which examined rocks and soil near the lander. The mission demonstrated an inexpensive landing approach using parachutes, retrorockets, and airbags rather than a traditional powered touchdown.

A common mix-up is confusing Ares Vallis with Chryse Planitia. Chryse Planitia is the broader regional setting, while Ares Vallis identifies the ancient channel area where Pathfinder landed. The mission ended its primary operations in 1997 after transmitting extensive engineering and scientific data.