score:4
Most of them. I know that's kind of vague but:
...In these five years, 813 cases involving private land claims were heard by the Commission : 604 claim were confirmed; 190 rejected; and the rest were withdrawn. Of these 813 cases, only three were decided by the Board: the rest were appealed to the District court and then a majority of these were finally decided by the Supreme Court.
Grants_of_Land_in_California_Made_by_Spanish_or_Mexican_Authorities_State_Lands_Commission.pdf
So if we take this (lengthy) document at face value, over 400 (most) were settled at the Supreme Court level.