Fall River (Wyoming, Idaho)

Fall River rises on the Madison and Pitchstone Plateaus in the southwest corner of Yellowstone National Park, Wyoming and flows approximately 64 miles (103 km)^[3] to its confluence with the Henrys Fork of the Snake River near Ashton, Idaho. Historically, the river was referred to as the Middle Fork of the Snake River^[4] or as Fall River or the Falls River by trappers and prospectors as early as the 1830s.^[5] It was officially named the Falls River by the 1872 Hayden Geological Survey, but was always called Fall River by the locals^[6] and so the U.S. Board on Geographic Names changed the official name to Fall River in 1997 at the request of Idaho authorities.^[1] The river is home to numerous waterfalls and cascades in its upper reaches.

Fall River
Fall River, Yellowstone National Park, 1964
Location of the mouth of the Fall River in Idaho Show map of Idaho Fall River (Wyoming, Idaho) (the United States) Show map of the United States
Location
Country	United States
State	Wyoming, Idaho
Counties	Teton County, Wyoming, Fremont County, Idaho
Physical characteristics
Source
• location	southwest of Lewis Lake, Teton County, Wyoming
• coordinates	44°14′51″N 110°45′43″W[1]
• elevation	8,872 ft (2,704 m)[2]
Mouth	Henrys Fork
• location	northeast of St. Anthony, Fremont County, Idaho
• coordinates	44°01′07″N 111°34′52″W[1]
• elevation	5,046 ft (1,538 m)[1]
Length	64 mi (103 km)[3]

Waterfalls

The Fall River is located in the remote Cascade Corner of the park, a name given to the southwest section of the park by then-superintendent Horace Albright in 1921 for the proliferation of waterfalls and cascades in the Fall and Bechler River drainages. Several major Yellowstone waterfalls exist in the Fall River watershed:^[7]

• Cave Falls, 20 feet (6.1 m),44°08′41″N 110°59′50″W^[8]
• Terraced Falls, 130 feet (40 m), 44°08′50″N 110°51′51″W^[9]

Angling

Although the Fall River is in the remote Cascade Corner of the park, it is popular with local anglers. It holds mostly cutthroat trout and a few rainbow trout and brook trout. Because of spring runoff, the river is generally not fishable until mid-July, and access is difficult.^[10][11] Within the park, the upper section of the river is accessible via the Grassy Lake Road, which starts near the south entrance to the park, while the lower sections are accessible via the Cave Falls Road in Idaho. Once the Fall River leaves the park, it is accessible in various locations via Idaho county roads.

See also

• List of rivers of Idaho
• List of longest streams of Idaho
• List of rivers of Wyoming

Notes

1. "Fall River". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. December 31, 1992. Retrieved July 23, 2013.
2. Source elevation derived from Google Earth search using GNIS source coordinates.
3. "National Hydrography Dataset". United States Geological Survey. Retrieved July 23, 2013.
4. Richard (Beaver Dick) Liegh refers to Fall River as the Middle Fork in his journals. See Beaver Dick, The Honor and The Heartbreak by Thompson and Tompson, Jelm Mountain Press, 1981, ISBN 0-936204-26-5
5. Whittlesey, Lee (1996). Yellowstone Place Names. Gardiner, MT: Wonderland Publishing Company. p. 103. ISBN 1-59971-716-6.
6. The local power company that was founded in the 1930s was named Fall River Electric
7. Whittlesey, Lee (1996). Yellowstone Place Names. Gardiner, MT: Wonderland Publishing Company. pp. 61–62. ISBN 1-59971-716-6.
8. "Cave Falls". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
9. "Terraced Falls". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
10. Parks, Richard (1998). Fishing Yellowstone National Park. Helena, MT: Falcon Press. ISBN 1-56044-625-0.
11. Mathews, Craig; Molinero, Clayton (1997). The Yellowstone Fly-Fishing Guide—An authoritative guide to the waters of Yellowstone National Park. Guilford, CT: The Lyons Press. ISBN 1-55821-545-X.