The flight instructor reported the instructional flight initially proceeded without incident. The plan was for the pilot-receiving-instruction to work on off-airport, pinnacle landings. The pilot’s first steep approach was completed with no issues. They moved about one-half mile to the west, and the pilot initiated an approach to an elevated dirt road. The road had a hump in the middle, and the pilot intentionally remained light on the skids to ensure a stable set down. However, as the nose of the helicopter began to rise due to the hump in the road, the tail rotor blades contacted the ground. The pilot subsequently lost control of the helicopter. The helicopter came to rest on a descending embankment from the road. The forward portion of the left landing skid, the tail skid, and the aft portion of the tail boom separated. One tail rotor blade was separated near mid-span and located at the accident site. Damage to the outboard leading edge of one main rotor blade appeared consistent with contact to the tail boom. The flight instructor stated there were no failures or malfunctions associated with the helicopter before the accident. He also noted that becoming more familiar with the helicopter before moving to complex maneuvers such as an off-airport, pinnacle landing might have resulted in a different outcome.