The banyan tree in Lahaina, Hawaii is primarily described as being 150 years old. This information is sourced from the news article regarding the efforts of volunteers in preserving the tree after the Maui fires. As of the given date, August 29, 2023, the tree is said to be 150 years old. The town of Lahaina holds this iconic banyan tree, which has likely witnessed significant historical events and changes over the past century and a half.