Steamboats on the Yukon River played a role in the development of Alaska and Yukon. Access to the interior of Alaska and Yukon was hindered by large mountains and distance, but the wide Yukon River provided a feasible route. The first steamers on the lower Yukon River were work boats for the Collins Overland Telegraph in 1866 or 1867, with a small steamer called Wilder. The mouth of the Yukon River is far to the west at St. Michael and a journey from Seattle or San Francisco covered some 4,000 miles (6,400 km).