The defining geographical feature of Billings, a continuous band of sandstone and volcanic rock cliffs that runs along the northern edge of the city for several miles. From the top — accessible by car or by several hiking trails — the view takes in the entire Yellowstone Valley, the city below, and on clear days the snow-capped Beartooth Mountains to the southwest.
Rimrock Trail (about 3 miles one way) follows the top of the escarpment and is the most popular walking route. Phipps Park at the east end of the Rims has picnic tables and a good overlook. The Rimrocks are also home to prairie falcons, which nest in the cliff faces and can often be seen riding thermals above the city.