Atwood Biographical Note:
| 1872, October 1 | Born at Chicago, Illinois |
| 1893(?)-1903 | Student, The University of Chicago (A.B. 1897, Ph.D. 1903) |
| 1900 | Married Harriet Towle Bradley 1900-1949 Geologist, U.S. Geological Survey |
| 1902-1913 | Instructor to Associate Professor of Geology, The University of Chicago |
| 1913-1920 | Professor of Physiography, Harvard University |
| 1920-1946 | Professor of Physical and Regional Geography, Director of the Graduate School of Geography, and President, Clark University |
| 1920 | Publication of New Geography (Boston: Ginn & Company) |
| 1925 | Founded Economic Geography |
| 1929-1933 | President, National Parks Association |
| 1932 | Publication of Physiography and Quaternary Geology of the San Juan Mountains, Colorado (with Kirtley F. Mather) (Washington: U.S. Geological Survey) |
| 1932-1935 | President, Pan American Institute of Geography and History |
| 1933-1934 | President, Association of American Geographers |
| 1940 | Publication of The Physiographic Provinces of North America (Boston: Ginn & Company) |
| 1945 | Publication of The Rocky Mountains (New York: Vanguard Press) |
| 1946 | LL.D., Clark University |
| 1946-1949 | President Emeritus, Clark University |
| 1949, July 24 | Died at Annisquam, Massachusetts. Buried at Mt. Auburn Cemetery, Cambridge, Massachusetts |