The pilot reported that while on a local area flight he elected to land on an unimproved ridge top. He said that after touching down he realized the landing area he selected was rougher than he anticipated, and attempted to abort the landing. During the aborted landing, he said the right main landing gear impacted elevated terrain and was damaged. He said he was then forced to continue the landing. As a result of the impact and landing, the main landing gear fuselage attachment points received substantial damage.