In Denver, he spoke on his support of Prohibition, and continued west making a series of speeches not matched by any president until Franklin Roosevelt. Harding had become a supporter of the World Court, and wanted the U.S. to become a member. In addition to making speeches, he visited Yellowstone and Zion National Parks,[184] and dedicated a monument on the Oregon Trail at a celebration organized by venerable pioneer Ezra Meeker and others.[185]
On July 5, Harding embarked on USS Henderson in Washington state. He was the first president to visit Alaska, and spent hours watching the dramatic landscapes from the deck of the Henderson.[186] After several stops along the coast, the presidential party left the ship at Seward to take the Alaska Railroad to McKinley Park and Fairbanks, where he addressed a crowd of 1,500 in 94 °F (34 °C) heat. The party was to return to Seward by the Richardson Trail, but due to Harding's fatigue, they went by train.[187]
On July 26, 1923, Harding toured Vancouver, British Columbia as the first sitting American president to visit Canada. 