Ashton Reservoir

Area Status: Open
This area is Open

Ashton Reservoir

Ashton Reservoir, located just north of Ashton along Henry's Fork of the Snake River, provides excellent trout fishing, water skiing, and canoeing. There is a power plant at the dam just west of Ashton and a beautiful ribbon waterfall by this dam. The Reservoir and facilities are maintained by PacificCorp Energy personnel.

At a Glance

Operational Hours: Rocky Mountain Power has drawn down the Ashton Reservior to repair the dam.  This should be completed by 2012.
Area Amenities: Boat ramp,Picnic tables,Toilets
Information Center: The Ashton hydroelectric plant is operated by PacificCorp Energy, which provides electric generation services to Rocky Mountain Power and Pacific Power.  The Ashton plant is located on the Henry's Fork about 2.5 miles west of Ashton, ID.  The plant began operating in 1914 and was later purchased and expanded in 1925 by Utah Power & Light Co. (a predecessor company of Rocky Mountain Power).  The dam and powerhouse has three generating units.  The dam is a rock and earth filled structure 60 feet tall and 226 feet long with a 70 foot wide concrete intake and 82 foot long spillway.

General Information


Heading north on Highway 20 from Ashton, ID drive for approximately 3 miles,  turn left on the other side of the bridge over the Henry's Fork River, drive approximately .3 miles and turn left to go down to the boat ramp.

Recreation Map

Map showing recreational areas. Map Information



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Water Activities

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Picnic tables
Toilets Porta Potties
Boat ramp
Areas & Activities


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  Elevation : 
5157 ft