Opportunity is completing the exploration of 'Marathon Valley' on the rim of Endeavour crater.

The rover completed a Panoramic Camera (Pancam) mosaic of the grooves on Sol 4474 (Aug. 24, 2016), along with an Alpha Particle X-ray Spectrometer (APXS) measurement.

Opportunity bumped only 24 inches (62 centimeters) on the next sol for a closer look at some nearby surface targets. From this location, the rover collected a Pancam panorama of 'Lewis and Clark Gap,' the next destination.

On Sol 4477 (Aug. 27, 2016), Opportunity headed south for about 161 feet (49 meters) with a small dogleg at the end of the drive. As is general with driving, post-drive imagery was collected. The rover continued to head towards the gap on Sol 4479 (Aug. 29, 2016), with a 51 feet (15.4-meter) drive. Atmospheric opacity (tau) has increased due to regional dust storms.

The elevated tau reduces the available solar energy, so the drive was not very long. On Sol 4480 (Aug. 30, 2016), Opportunity continued to drive further with only a 39 feet (11.8-meter) drive. A color Pancam panorama was collected of the feature, called 'Wharton Ridge.'

As of Sol 4480 (Aug. 30, 2016), the solar array energy production is 453 watt-hours with an elevated atmospheric opacity (Tau) of 1.079 and a solar array dust factor of 0.693.

Total odometry is 26.83 miles (43.18 kilometers).