Vessels are lit with Christmas lights during the annual boat parade of lights in Portland Harbor, seen from the Aucocisco ferry on Saturday, Dec. 16, 2017.

Passengers board the Aucocisco ferry before heading out to watch the annual boat parade of lights in Portland Harbor.

Vessels are lit with Christmas lights during the annual boat parade of lights in Portland Harbor, seen from the Aucocisco ferry on Saturday, Dec. 16, 2017.

Vanessa Wipfler of Portland, left, and Jacqueline Maloch of Atlanta pose for a photograph on the Aucocisco ferry during the annual boat parade of lights in Portland Harbor.

Passengers watch the annual boat parade of lights in Portland Harbor from aboard the Aucocisco ferry on Saturday, Dec. 16, 2017.

A small boat decorated with a Christmas tree heads out for the annual boat parade of lights in Portland Harbor.