The solo private pilot was landing a tailwheel-equipped airplane on a mountaintop airstrip at the completion of a Title 14, Code of Federal Regulations Part 91 personal flight. She reported that while landing, she inadvertently touched down beyond her intended touchdown point. Realizing she would be unable to stop the airplane before reaching the end of the airstrip, she said she applied heavy braking at the end of the landing roll, but the airplane continued off the end of the airstrip and nosed over. The airplane sustained substantial damage to the left wing, left wing lift strut, and empennage. The pilot said there were no preaccident mechanical problems with the airplane.