Opportunity just finished up the super crater overview panorama, pulled away from the summit (here at -1380 m) and we are on our way to Marathon Valley! It's all downhill (about 70 m down in elevation) from here.
Above is a map showing the drive and 1 m contours. Note the small impact crater a few meters to the SW, visible in the Navcam mosaic posted below.
The impact crater is visible on the right in the Navcam mosaic above, taken at the end of the drive on sol 3902. Above 40 m out the terrain rolls over so that the rest of the slope downhill is out of view. But in the distance at about -4.5/165 you can make out the north slope of Marathon Valley where we are headed. We are a little under 500 m from the valley now.