58 
FRANCIS RAM ALE Y 
Lakes in Clear Creek County: Steuart Lake (11,350), Reynold's Lake 
(11,350), Loch Lomond (11,140). 
The continental divide in the area studied is, for the most part, about 
12,000 feet above sea level, with a few passes slightly lower and certain 
Fig. I. Key map of Colorado. The Continental Divide is shown by the heavy 
dotted line, the front range of foothills by the short horizontal lines. The black rectangle 
outlines the area in which lake vegetation has been studied. Immediately north of this 
area is situated the Rocky Mountain National Park (not indicated on the map), of about 
the same size and shape as the part here marked out. 
peaks much higher (Mt. Audubon, 13,225; Arapahoe Peak, 13,506; James 
Peak, 13,260; Parry Peak, 13,345). Long ridges extend out peninsula- 
like from the divide. Between the ridges are deep valleys all or most of 
which held glaciers at various points during comparatively recent times. 
On Arapahoe Peak there is still a permanent glacier of considerable size. 
A mile to the north is a smaller one (Henderson Glacier) and two others, 
also small, the Fair Glacier and the Isabelle Glacier, are four miles farther. 
At the extreme northern limit of our area of study are two more, the St. 
Vrain Glaciers. The broader parts of valleys are from one half to three 
quarters of a mile in width, and each may hold a group of small lakes, 
sometimes six or more. Along the flanks of ridges and on the slopes of 
the divide there are numerous cirques each with a single small lake. 
The higher lakes are chiefly of the rock-basin type while those of the 
subalpine zone are usually morainal. No ox-bow lakes are known to the 
writer above 10,000 feet altitude, although they occur in parks of the mon- 
tane zone (8,500 to 10,000 feet). 
