1939
Vegetation type map of the park prepared by Branch of Forestry, National Park Service. USNPS, Master Plan, 1942, two maps and key.
Newton B. Drury appointed to Yosemite Advisory Board, Feb. 24. YNP, 1939, p. 10.
1940
Newton B. Drury appointed Director of the National Park Service in June, when Arno B. Cammerer requested that he be relieved of his duties as Director for reasons of health. USNPS, 1940, p. 204.
Tioga Road, Crane Flat to McSwain Meadows, and Big Oak Flat Road, from Crane Flat to El Portal Road, constructed on modern standards; opened with ceremonies, June 23. YNP, 1940, p. 1. USNPS, Master Plan, 1942.
Cedar Cottage (Upper Hotel) and Oak Cottage razed. YNP, 1941, pp. 3-4; 1942, p. 6.
C. A. Harwell vacated the Yosemite Park Naturalist position Sept. 7. YNHA, 1941, p. 37.
Ski-touring accommodations provided at Ostrander Lake, under slopes of Horse Ridge. YNP, 1941, p. 2.
William E. Colby appointed to membership on Yosemite Advisory Board effective November 15. Maulding, Mrs. J. Atwood.