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Hot Sulphur Springs in Grand County, Colorado — The American Mountains (Southwest)
 

Headwaters of Exploration

 
 
Headwaters of Exploration Marker image. Click for full size.
Photographed by Cosmos Mariner, July 28, 2025
1. Headwaters of Exploration Marker
Inscription.
In 1869, a Civil War veteran turned college professor, Major John Wesley Powell, led nine men on the last great exploration of the continental United States. Powell and his men set out from Green River, Wyoming, on May 24, 1869, on a journey to map the uncharted regions of the Green and Colorado rivers. Jack Sumner and Andy Hall continued for nearly four months to the river's end in the Bay of California. While the story of their river adventure is well known, the expedition's ties to Middle Park and Hot Sulphur Springs are not.

John Wesley Powell and Middle Park
Powell's relationship with Middle Park began in 1867 when Powell and his wife, Emma Dean Powell, spent two months living in Jack Sumner's cabin at the nearby hot sulphur springs while exploring the area. During this time Sumner and Powell discussed future expeditions to map the regions of the Colorado and Green rivers that included the Grand Canyon.

In 1868 Powell returned to Middle Park with a party of more than 20 students, professors, boosters, and, of course, Emma Dean. The expedition collected specimens and data for research. In August Powell, his brother Walter,
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and two students led by William Byers, Jack Sumner, and Ned Ferrell conduct the first recorded ascent of Longs Peak. Other notable visitors to the hot springs were Schuyler Colfax, later to be the vice president of the U. S.; Lt. Governor William Bross of Illinois; journalist Samuel Bowls; famed frontiersman Jim Baker; and 600 Northern Utes.

From the original 1868 expedition, only Powell and his brother remained when Powell pushed off into the Green River in Wyoming for his epic expedition. George Badley, Andy Hall, and Frank Goodman joined in Wyoming. Oramel and Seneca Howland, Billy Hawkins, Bill Dunn, and Jack Sumner joined Powell in Colorado. Sadly the Howland brothers and Billy Dunn, fearing for their lives, left the expedition never to be heard from or seen again.

[photo captions]
• Longs Peak, elevation 14,259 feet
• This William Henry Jackson photograph shows the hot sulphur springs in 1874. It would have looked similar when the Powells were here in 1867 and 1868.
• Emma Dean Powell was one of the earliest non-Indian women to visit the hot sulphur springs.

Sponsors: Barbara Mitchell, Grand County Historical Association and Town of Hot Sulphur Springs
To learn more about Grand County history visit the Pioneer Village Museum in Hot Springs.

 
Erected by Grand
Marker detail: Major Powell, a Southern Piaute<br> & Jack Sumner image. Click for full size.
2. Marker detail: Major Powell, a Southern Piaute
& Jack Sumner
Major Powell shown talking with a Southern Piaute (left) and Jack Sumner began their partnership during Powell's first visit to the springs in 1867.
County Historical Association.
 
Topics. This historical marker is listed in these topic lists: EducationExplorationWaterways & Vessels. A significant historical date for this entry is May 24, 1869.
 
Location. 40° 4.446′ N, 106° 6.507′ W. Marker is in Hot Sulphur Springs, Colorado, in Grand County. It is at the intersection of Parshall Divide Road (County Road 20) and South Pioneer Park Road, on the left when traveling west on Parshall Divide Road. The marker is in Pioneer Park, near the Hot Sulphur Springs Campground entrance. Touch for map. Marker is in this post office area: Hot Sulphur Springs CO 80451, United States of America. Touch for directions.

Regionally, this marker is in the Colorado High Rockies and on the Continental Divide. It is also in the American Mountain West. Globally, it is in North America, the Rocky Mountains, the Western Hemisphere, the Western World, and the Anglosphere.

Other nearby markers. At least 7 other markers are within walking distance of this marker: Hot Springs to Resort (here, next to this marker); The First School in Grand County (about 400 feet away, measured in a direct line);
Marker detail: John Wesley Powell Centennial Stamp image. Click for full size.
3. Marker detail: John Wesley Powell Centennial Stamp
The U.S. Postal Service centennial stamp depicts Major Powell, William Dunn, and Jack Sumner in their boat, the Emma Dean, going through a massive rapid.
Ranch House (approx. 0.4 miles away); Blacksmith Shop (approx. 0.4 miles away); Grand County Courthouse (approx. 0.4 miles away); Grand County Jail (approx. 0.4 miles away); Eight Mile Schoolhouse (approx. 0.4 miles away).
 
Also see . . .  John Wesley Powell (Wikipedia).
Excerpt:  John Wesley Powell was an American geologist, U.S. Army soldier, explorer of the American West, professor at Illinois Wesleyan University, and director of major scientific and cultural institutions. He is famous for his 1869 geographic expedition, a three-month river trip down the Green and Colorado rivers, including the first official U.S. government-sponsored passage through the Grand Canyon.

Powell was appointed by US president James A. Garfield to serve as the second director of the U.S. Geological Survey (1881–1894) and proposed, for development of the arid West, policies that were prescient for his accurate evaluation of conditions. Two years prior to his service as director of the U.S. Geological Survey, Major Powell had become the first director of the Bureau of Ethnology at the Smithsonian Institution where he supported linguistic and sociological research and publications.

In 1869, John Wesley Powell set out to explore the Colorado River and the Grand Canyon. Gathering ten men, four boats and food for 10 months, he 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, and completed the journey on August 30, 1869.

(Submitted on March 16, 2026, by Cosmos Mariner of Cape Canaveral, Florida.) 
 
Headwaters of Exploration Marker image. Click for full size.
Photographed by Cosmos Mariner, July 28, 2025
4. Headwaters of Exploration Marker
Looking north from the Hot Sulphur Springs Campground entrance. Parshall Divide Road (County Highway 20) crosses in the background.
 
 
Credits. This page was last revised on March 16, 2026. It was originally submitted on March 16, 2026, by Cosmos Mariner of Cape Canaveral, Florida. This page has been viewed 19 times since then. Photos:   1, 2, 3, 4. submitted on March 16, 2026, by Cosmos Mariner of Cape Canaveral, Florida.
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Aug. 24, 2026