Information on the geographic origin of fall 1980 first-time freshmen for both the public and private sectors of Colorado higher education is presented. Detailed data is also appended by institution and by county of high school. Among the findings are the following: fewer than one-third of the 1979 and 1980 Colorado public high school graduates entered Colorado public colleges and universities the year of their high school graduation; an additional 2.4 percent of the 1980 Colorado public high school graduates entered the state's private higher education institutions; it is estimated that approximately 2 percent left their home state of Colorado to attend college elsewhere; 1980 Colorado high school graduates comprised 43.6 percent of the public sector's first-time freshman class and 30.6 percent of the private sector's frist-time freshman class; 1980 Colorado high school graduates comprised 8.7 percent of the public sector's and 6.4 percent of the private sector's opening fall enrollment; a net increase of 1,002 in 1980 over 1979 first-time freshmen is attributed to increased numbers of students out of high school one or more years before matriculation; the first-time freshman class of doctoral degree granting institutions is comprised of 92.9 percent of 1980 high school graduates, for master's and baccalaureate degree granting institutions the comparable figure is 69.2 percent, and for associate degree granting institutions the figure is 42.6 percent; approximately four of every 10 private sector first-time freshmen are from a 1980 out-of-state high school graduating class, and the comparable figure in the public sector is one out of 10; and California, Illinois, and New York have been the top three sending states for over 10 years--in 1980 these three states sent 29 percent of the total out-of-state freshmen. (SW)