The six trustees were all appointed by former President Joe Biden.
The trust told the Chronicle it had anticipated it would ultimately get new members, and it's waiting on new appointees.
UPDATE: What's next for SF's Presidio Trust after Pres. Trump fired all 6 board members?
The terms for three of them already expired last May, and the three others were set to expire May of next year.
The trust runs the 1,500-acre park.