The East Inlet Trail in Rocky Mountain National Park, Colorado, was established in 1913 to provide access from Grand Lake to a series of lakes 6 miles (9.7 km) to the east of Grand Lake. The trail originates at the east stream inlet to Grand lake: confusingly, it is close to the west portal of the Alva B. Adams Tunnel which conveys water from the west side of the Continental Divide under the park to the east slope of the Rocky Mountains. The trail was developed further in the 1920s, but was still considered to be in poor condition. In the 1930s further improvements were made, and in 1934 workers from the Public Works Administration rebuilt the section between Lone Pine Lake and Lake Verna. In 1940 workers from the Civilian Conservation Corps improved three miles of trail beyond Adam Falls,