John Wesley Powell’s Base of Operations: Kanab, Utah

John Wesley Powell in 1872.

John Wesley Powell’s River Trips

John Wesley Powell made the first two organized river expeditions through the Grand Canyon. The first expedition began at Green River, Wyoming, on the Green River. The expedition followed the Green River through the canyons of Lodore, Desolation, Labyrinth, and Stillwater before joining the Colorado River above Cataract Canyon. Powell and his crew continued through Cataract Canyon and Glen Canyon, finally arriving at Grand Canyon. The crew had started on May 24, 1869, but did not reach the Grand Canyon until August 4. Powell’s crew exited the Grand Canyon at the Grand Wash cliffs on August 29. A few days earlier, Bill Dunn and the Howland brothers, decided to leave the expedition and attempted to hike out of the Grand Canyon via Separation Canyon. They never made it.Powell’s second expedition followed the same route as the first trip. Except, this time Powell decided to stop at the mouth of the Paria River, and explore and map parts of what would become Southern Utah and Northern Arizona on horseback.

The Base of Operations 1871-72 Kanab, Utah

Powell’s first stop and the supply base for his operation was Kanab, Utah. All of the main members of Powell’s second expedition were in Kanab, Utah, in early December 1871. This included John Wesley Powell, A. H Thompson, W.C. Powell, F.S. Dellenbaugh, F.M. Bishop, E.O. Beaman, J.K. Hillers, S.V. Jones, and A.H. Hattan. Almon Harris Thompson was the leader when Powell was not around. He was also the astronomer for the expedition. W.C. Powell, Hillers, and Beaman were in charge of photography for the expeditions. Dellenbaugh and Bishop made maps, and Hattan was the cook.


The first order of business for the Powell expedition in Kanab was to set up a “base line.” A base line is a line of known distance that can be used to figure out distances across the countryside by using geometry and triangulation. Powell determined a spot just south of Kanab for the base line. The line was 9 miles long and under ideal conditions, it could be used to figure out distances as far as 60 miles. Thompson and the men set up a tent camp about 6 miles south of Kanab near present day Fredonia, Arizona. The camp was constructed on the middle of the base line, west of todays highway 89A.


Christmas day of 1871, the entire Powell expedition had a celebration. Emma Powell and Ellen Thompson made treats and plum pudding. The tent camp had a main tent with a stove in it. In addition there were two other separate tents for Powell and Thompson. The men finished their survey work around Kanab on February 21, 1871. Among their accomplishments was learning that Kanab was in Utah, 14,863 feet north of the Thirty-Seventh Parallel. The thirty seventh parallel makes the border of Utah and Arizona, New Mexico and Colorado, and Oklahoma and Kansas.

Powell and his group liked being in Kanab. They could pick up and mail letters. They had access to blacksmiths to repair broken items. There were carpenters to fabricate posts and other necessary survey equipment. They had people who could shoe their horses and keep track of their animals, and they could find help for their survey work. In town Powell cold buy meat, cheese, molasses, potatoes, vegetables, butter, and milk. In addition Kanab offered a social life for Powell’s men. They often attended dances at the Kanab schoolhouse, dined with people from Kanab, and Captain Francis Bishop even joined a debate group. John Wesley Powell’s wife Emma and his infant daughter spent some of the winter in Kanab. As did Powell’s sister and Thompson’s wife Ellen Powell Thompson. Ellen collected botanical species for the expedition.

Black and White photo of Kanab Utah.

Exploring Southern Utah and Northern Arizona and a River Trip Through Grand Canyon

From March until the first part of July the Powell Expedition explored the west end of the Kaibab Plateau, Dirty Devil River country, Henry Mountains, Mount Trumbull area, and Berry Spring(ten miles above Washington, Utah, on the Virgin River). Then it was time to get back on the Colorado River. The group headed back to Lees Ferry, and completed their second Colorado River expedition, 143 miles downstream at the mouth of Kanab Creek. They left their boats near where Kanab Creek joined the Colorado River. Powell and his men followed the small stream for approximately 50 miles back to the small settlement of Kanab, Utah.

Preliminary Map No. 2, a map worked on by the Powell Party in Kanab, Utah.

At the end of November of 1872 the Powell party was disbanded. Most of the group headed back home to the eastern United States. Dellenbaugh and Thompson stayed and worked on the map that is published in Dellenbaugh’s book Canyon Voyage:


“The map we made in a tent in Dec. 1872 and Jan. 1873 in Kanab. was based on our triangulation from the nine mile measured base line at Kanab. . . . Prof. Thompson laid down the triangulation points and I drew in the topography assisted by John Renshaw a new comer then. This map was soldered in a tin tube which I carried on my back to Salt Lake in Feb. of 1873 and sent to Washington. It was there divided into two parts which are reproduced in my Canyon Voyage. ”

More About the John Wesley Powell’s Base of Operations: Kanab, Utah

Sandy beach inside a cavern overlooks a river, with red rock canyon walls and a blue sky.
February 15, 2026
The Colorado River below Glen Canyon Dam flows through the lower reaches of Glen Canyon on its way to Lees Ferry , forming one of the most studied and discussed stretches of river in the American Southwest. Released from the base of the dam, the water is typically clear and tightly controlled. In recent years, however, lower water levels in Lake Powell have caused releases to come from shallower depths, warming the river compared to past decades and changing the conditions downstream. This reach is calm and approachable, making it a popular destination for kayaking, rafting, fishing, and flatwater exploration. Visitors often take time to linger along the banks, explore side canyons, and pull over at small beaches and alcoves—experiencing the river at an unhurried pace that encourages observation and learning.  Quick facts about this stretch of river naturally help frame why it matters:
Glen Canyon Dam with bridge and canyon walls under a blue sky. Water flows towards the dam.
February 12, 2026
The Dirty Devil River joins the Colorado River at River Mile 169.5. John Wesley Powell camped at this confluence on July 28, 1869, describing the tributary as extremely muddy and foul-smelling. Jack Sumner later named it the Dirty Devil. The Dirty Devil is formed by the confluence of Muddy Creek and the Fremont River near present-day Hanksville, Utah. The Fremont River originates at Fish Lake and flows along the Waterpocket Fold through Capitol Reef National Park. Muddy Creek drains the San Rafael Swell. Historic Context — Powell’s Expeditions: Powell’s 1869 expedition recorded the Dirty Devil as both a geographic reference and a warning. In his later expeditions of 1871–72, Powell returned with improved boats and a scientific mandate. Tributaries such as the Dirty Devil became fixed reference points for mapping and geologic observation. Powell’s journals note the heavy silt load and poor water quality here, and his party avoided using the Dirty Devil as a water source when possible.
Camping gear on a sandy beach near a red rock wall and river under a cloudy sky.
February 12, 2026
Camping and Dining