When Columbia Beach’s season opened on June 6, 1926, over 7000 people flocked to the park to get some relief from early summer heat. The Miniature Railroad with its shiny new engine was very popular as was the Merry-go-round and the Ferris Wheel.
Columbia Beach Amusement Park operated from 1916 until 1926, when a fire destroyed the dance pavilion. When the Park was at its peak, as many as 15,000 people would swim there at one time.
In 1927, the name of the island was changed to Tomahawk Island. Portland school children had a contest to name the island. It was chosen because according to legend, an Indian removed a tomahawk that was on display at the Lewis & Clark Exposition in 1905. It is said that he buried the tomahawk on what had been known as Sand Island.
Today, Tomahawk Island is connected to Hayden Island and Jantzen Beach. Part of the Columbia River was filled in to make it one body of land.