Reached the maximum

CRESTED

Think of a wave at its highest point before it starts to fall or a bird perched at the very top of a hill.

Reached the maximum" hints at hitting the highest point, like a wave or hill does when it "crests." The answer "CRESTED" plays on that idea—it literally means to reach a peak or summit. The past tense "-ed" ending fits grammatically with the clue, making it a smooth solve for crossword fans familiar with nature or elevation terms.