NASA's Mars Exploration Rover Opportunity, working on Mars since January 2004, passed marathon distance in total driving on March 24, 2015, during the mission's 3,968th Martian day, or sol. A drive of 153 feet (46.5 meters) on Sol 3968 brought Opportunity's total odometry to 26.221 miles (42.198 kilometers).
NASA/JPL-Caltech/MSSS/NMMNHS
<a rel="nofollow" class="external text" href="http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA19154">Opportunity Rover's Full Marathon-Length Traverse</a>