LAKE-SHORE VEGETATION IN NORTH-CENTRAL COLORADO 59 
Fig. 2. Map of the area in which lake vegetation has been studied, i.e., the part of 
the state included in the black rectangle of figure i : portions of Grand, Boulder, Gilpin, 
and Clear Creek counties. The Continental Divide is in most places about 12,000 feet in 
altitude. Lakes close to the divide are of the alpine type; those from one to four miles 
away, and hence at lower altitudes, are generally of the subalpine type. The University 
of Colorado Mountain Laboratory located at Tolland, in Gilpin County, has served as the 
usual base from which trips were made on foot, but Ward, in Boulder County, was used as 
headquarters for the study of Redrock Lake. 
