Vandals turned a trio of greens and fairways on the 9-hole Golden Gate Park golf course into an illegal off-road course — twice.

Park officials discovered the first incident of ”heart-wrenching vandalism” on Oct. 1.

Recreation and Park Department

A vehicle or vehicles severely damaged holes 6, 7 and 8, causing an estimated $75,000 worth of damage to the public course. The seventh green, in particular, was ”destroyed beyond all recognition,” the department reported.

Grounds crews worked over the weekend to make some mends, but the same three holes were vandalized again Monday night and they remain closed.

The estimated damage from Monday night’s rampage has not been calculated, said Elton Pon, spokesman for the Recreation and Park Department.

The destruction comes after vandals destroyed or greatly injured some 75 trees and plants in Golden Gate Park earlier this year.

”It’s a tragedy. Golden Gate Park has been hit hard,” Pon said. He said park officials are working with police but have yet to identify any suspects.