Captain John Charles Fremont was born in 1813 and at the age of 31, in June 1844, was exploring the northern reaches of the Republic of Texas when he passed through Grand County. This marked the first appearance of official government enterprise in Grand County.
His expedition included some 40 explorers, including people of Creole, French, and Black descent. The guides were Thomas Fitzpatrick and Kit Carson. This expedition entered Grand County via Muddy Pass and exited via the Blue River, never traveling into the eastern part of the County.
They met with some 200 Arapahoe Indians, who were traditionally suspicious of the intruders, but through the giving of trade gifts, overt conflicts were avoided. The cartographer for that expedition was Charles Preuss, who provided the first map on which all of the central Rocky Mountain Parks were named and mapped accurately.
R.C. Black, Island in the Rockies, Pruett Press, 1969