The Sourdough Lodge (originally known as Hart's Road House) was built in Alaska between 1903 and 1905 of logs. It was one of a number of roadhouses built along the Valdez Trail (now known as the Richardson Highway). The roadhouses were about 15 miles (24 km) apart and offered shelter for travellers and road construction crew. It was designated a National Historic Landmark on June 2, 1978 as it was the oldest continuously-operating roadhouse in Alaska.