PARK RANGE. 131 



to the north, forms a portion of the Park boundary, and connects the 

 Medicine Bow with the Park Range. 



North of Davis Peak, the range strikes oif to the northwest in a broad 

 flat-topped mass', presenting uniform unbroken slopes, with no prominent 

 outlying spurs, and with a trend nearly parallel to the Medicine Bow 

 Range. 



The drainage-system of the range is remarkably simple. Streams at 

 regular intervals from each other, having their sources high up on the axis 

 of the range, drain both east and west in very direct courses. Only one, 

 the Grand Encampment, an eastward-flowing stream, breaks through from 

 the opposite side, receiving the waters from the western tributaries of the 

 Pelham and Davis Peak group. 



All the eastward-running creeks contribute their waters to the North 

 Platte, while the western streams flow into the Little Snake and Yampa 

 Rivers, the main eastern tributaries of Green River. The streams of the 

 east side, enumerating from the south, are Cheyenne and Arapahoe Creeks 

 within the North Park, and Grange, Beaver, Grand Encampment, Cow, 

 Warm Spring, and Jack's Creeks, in the Platte Valley. On the west side, 

 there are Moore's Fork and Elk River of the Yampa, and Battle and 

 Savory Creeks of Little Snake River. 



Traces of local glaciers, such as groovings and moraines, are abundant 

 throughout these hills, as through most of the higher mountain-regions, 

 and are shown also in the character of the topography. 



In the southern end of the range, in the region of Mount Zirkel and 

 Ethel Peak, the eastern face exhibits a number of remarkable glacially- 

 eroded canons. The upper portions are large amphitheatres, with grand 

 mural faces, which soon contract into deeply-cut trough-shaped valleys, 

 with all the characteristic features of glacial erosion. These valleys are 

 never more than 3 or 4 miles in length, and at their mouth, considering the 

 limited size of the ancient glaciers, are found immense terminal moraines, 

 which have undergone but little erosion in post-glacial times. It is as if 

 the entire former contents of the canon had been carried down and dumped 

 at the entrance, and had never been disturbed. 



In the northern portion of the Park Range, there are some secluded. 



