From
1867 he led a series of expeditions into the
Rocky Mountains and around the
Green and
Colorado rivers. In 1869 he set out to explore the Colorado and the Grand Canyon. He gathered nine men, four boats and food for ten months and set out from
Green River, Wyoming on
May 24. Passing through dangerous rapids, the group passed down the Green River to its confluence with the Colorado River (then also known as the Grand River upriver from the junction), near present-day
Moab, Utah. The expedition's route traveled through the Utah canyons of the Colorado River, which Powell described in his published diary as having ''…wonderful features—carved walls, royal arches, glens, alcove gulches, mounds and monuments. From which of these features shall we select a name? We decide to call it
Glen Canyon''. One man (Goodman) quit after the first month and another three (Dunn and the Howland brothers) left at Separation Rapid in the third, only two days before the group reached the mouth of the
Virgin River on
August 30, after traversing almost 1,500 km. The three who left the group late in the trip were later killed—probably by Indians. However, exactly how and why they died remains a mystery debated by Powell biographers; some, including
Jon Krakauer in his ''Under the Banner of Heaven'', have raised the possibility of a
Jack Mormon ambush. The song "Mr. Powell" by the
Ozark Mountain Daredevils recounts Powell's trip down the
Colorado River.
Powell retraced the route in
1871-1872 with another expedition, producing photographs, an accurate map, and various papers. In planning this expedition, he employed the services of
Jacob Hamblin, a
Mormon missionary in southern
Utah and northern
Arizona who had cultivated excellent relationships with the Native Americans. Before setting out, Powell used Hamblin as a negotiator to ensure the safety of his expedition from local Indian groups who he believed had killed the three men lost from his previous journey.
</b>Members of the first Powell expedition:'''
John Wesley Powell, trip organizer and leader, major in the Civil War
J. C. Sumner, hunter, trapper, soldier in the Civil War
William H. Dunn, hunter, trapper from Colorado
W. H. Powell, captain in the Civil War
G.Y. Bradley, lieutenant in the Civil War, expedition chronicler
O. G. Howland, printer, editor, hunter
Seneca Howland
Frank Goodman, Englishman, adventurer
W. R. Hawkins, cook, soldier in Civil War
Andrew Hall, Scotsman, the youngest of the expedition