Do you mean close enough to walk? It is around 2 miles from the CH to Perkins Cove. I would not recommend walking it. Shore Road is narrow and curvy in places. Dangerous for pedestrians.
The Cliff House uses a car service called Franman
The trolley stops running to the CH on Sept 3rd.
There’s plenty to do in the area. Others may chime in with ideas for you. You might reach out the the concierge desk at the hotel for help with arrangements. I am on a temporary assignment at the CH right now and must say the setting is stunning! And the hotel services appear to be top notch. Enjoy your stay.Edited: 22 June 2018, 19:21