298 Hayden and Gardner's Survey of the Territories. 
and 40° 20’ north, and between meridians 104° 80’ and 107° 
west, and contains about 20,000 square miles. It was divided 
by east and west lines into three districts, each about 58 miles 
broad by 130 long. The survey of each district was entrusted 
to a mixed party, of geologists and topographers. The north- 
ern district included the Middle Park, the middle district the 
South Park, and the southern the San Luis Park. Each district 
resents a complete section of the main upheavals of the Rocky 
ts. The whole area surveyed may be regarded as a section, 
160 miles broad, of the grandest ranges of the Rocky Moun- 
tain system at their point of greatest elevation; and as the 
most extended region of high peaks to be found in the country. 
From Mt. Lincoln, which is nearly in the center, we counted 
200 peaks of 13,000 feet or over. 
Between latitude 88° 30’ and 40° 30’, we find the Rocky 
sharply crested wall, with many 13,000-foot peaks, and with 8 
culminating points rising to 18,800 feet. This we call the Blue 
River group. To its northernmost and highest summit belongs 
the name of Mt. Powell, from the gallant explorer by whom It 
was first ascended in 1868. From Mt. Powell northward there 
are no high peaks until opposite the North Park, where the 
range rises again into summits of 12,000 feet and over. 
