Firefighters were able to extinguish the perimeter of the fire at about 4 p.m., according to the fire department. Mop-up operations are expected to continue over the next few weeks.
The fire began Sunday evening, originating on the east side of the island and since scorching about 380 acres, but the island's historic buildings were saved from damage, and no civilians or firefighters were injured, according to the fire department.
A single wooden water tank succumbed to the flames early Monday morning.
The cause of the blaze has not yet been determined.
The island remains closed to the public and will reopen when conditions are safe and power is restored, the fire department reported.
More information about the park can be found by calling (415) 435-5390.
ABC7's Alan Wang wrote a back story about Angel Island and how he gained new respect for it.
Click here to read Alan's blog: The historical significance of Angel Island