The Henrys Fork
Posted by: 
Volcanoguy
N 44° 11.276 W 111° 19.764
12T E 473674 N 4892799
History sign about the Henrys Fork in the Upper Mesa Falls area.
Waymark Code: WMC841
Location: Idaho, United States
Date Posted: 08/06/2011
Views: 5
This history sign along walkways leading to Upper Mesa Falls and deals with the Henrys Fork.
Marker Name: The Henrys Fork
Marker Type: Roadside
Marker Text:
Henrys Fork of the Snake River was named for Andrew Henry, who led a trapping expedition through the area in 1810. The primary source of the Henrys Fork is Big Springs, one of the largest freshwater springs in North America. Approximately 120,000,000 gallons of water at 52 degrees Fahrenheit flow from the spring daily. The springs and upper river remain ice-free year round.
Big Springs, located 30 miles north of Mesa Falls, is one of Island Park’s most popular attractions. Large rainbow, cutthroat and brook trout can be seen in the crystal clear waters. An interpretive trail and the historical Johnny Sack cabin are located nearby.
County: Fremont
Group Responsible for Placement: U.S. Forest Service
City: Not listed
Date Dedicated: Not listed
Marker Number: Not listed
Web link(s) for additional information: Not listed
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Visit Instructions:
In your log, please say if you learned something new, and if you took any extra time to explore the area once you stopped at the historic marker waymark.
If possible please post a photo of you OR your GPS at the marker location.
Also if you know of any additional links not already mentioned about this bit of Idaho history please include that in your log.