This is undoubtedly a cool milestone for the intrepid rover, but it blew through the real record last year when it became the universal long-distance champ for all man-made, off-Earth vehicles.
"This mission isn't about setting distance records, of course; it's about making scientific discoveries on Mars and inspiring future explorers to achieve even more," Steve Squyres, Opportunity principal investigator at Cornell University, said in a statement. "Still, running a marathon on Mars feels pretty cool."
Opportunity has been a massive return on investment for NASA, and it's pretty mind-boggling that the rover is still doing science despite its old age. She's like 1,000 in rover years.
To celebrate Opportunity's big win, the rover team at JPL will run a marathon-length relay next week at their lab. Hopefully their times are a little bit better.