Greys River

Alpine, Wyoming

The exact coordinates for this site are:
N43°4.608'/W110°50.300'

The Greys River is a tributary of the Snake River, flowing through western Wyoming in the United States. The river is about 62 miles (100 km) long, starting high up in the Wyoming Range, 45 miles (72 km) south of the town of Alpine in Lincoln County.

The towering Salt River Range to the west and the matching Wyoming Range to the east, both hosting several peaks that reach above 11,000 feet in elevation, this results in an awesome place to be. The surrounding mountains and their many canyons offer OHVing, horseback riding, hiking, and trophy elk and deer hunting with many Boon and Crocket records to prove it. The Greys River area is considered by many northwest Wyoming locals to be a one of their favorite multiple use playgrounds, the river offers great trout fishing, kayaking, rafting and canoeing and there are many access points along the road to access the river.

WATER QUALITY
  • No data available
  • Current Status
  • This status is based on the latest sample, taken on . Snake River Waterkeeper updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
CURRENT WEATHER
-2°C
A mix of sun and clouds
MONITORING FREQUENCY

Greys River is sampled from June 7th to August 30th

SOURCE INFORMATION

There is currently very limited water quality monitoring of Idaho's inland swim sites. The federal Beach Act does not cover freshwater or riverine beaches, and states in the Basin do not monitor Snake River swimming beaches or recreational access sites.

As part of its Water Quality Program, Snake River Waterkeeper monitors water quality at more than 100 sites on the Snake River and its tributaries for temperature, dissolved oxygen, pH, salinity/conductivity/total dissolved solids, ammonia, and nitrates. Data are collected at sample sites June-October and assigned safety ratings based on comparison to EPA's Recreational Water Quality Criteria for Human Health:

pH: 5 – 9 µg/L
Salinity/Conductivity/Total Dissolved Solids: 500 mg/L
Nitrates: 10 mg/L

A site is marked Green when single sample results meet all Human Health Criteria.
A site is marked Red when the results are equal to or above Human Health Criteria.
A site is marked Grey when there are no current results or no available information.
Sites found to exceed EPA's Aquatic Health Criteria are noted in site descriptions.

While criteria measured are useful indicators of contamination, there are many other potential sources of pollution that are not reflected in our Swim Guide, including E.coli and other bacteria, heavy metals, pharmaceuticals, fertilizers, and pesticides that harm aquatic life.

Download the free app for smartphone and learn about Swim Guide 3.0 at www.theswimguide.org. To learn more about our efforts to protect and restore the Snake River's water quality, visit www.snakeriverwaterkeeper.org.

WATER QUALITY GRAPH

Greys River

Alpine, Wyoming

WATER QUALITY
  • No data available
  • Current Status
  • This status is based on the latest sample, taken on . Snake River Waterkeeper updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
CURRENT WEATHER
-2°C
A mix of sun and clouds

The exact coordinates for this site are:
N43°4.608'/W110°50.300'

The Greys River is a tributary of the Snake River, flowing through western Wyoming in the United States. The river is about 62 miles (100 km) long, starting high up in the Wyoming Range, 45 miles (72 km) south of the town of Alpine in Lincoln County.

The towering Salt River Range to the west and the matching Wyoming Range to the east, both hosting several peaks that reach above 11,000 feet in elevation, this results in an awesome place to be. The surrounding mountains and their many canyons offer OHVing, horseback riding, hiking, and trophy elk and deer hunting with many Boon and Crocket records to prove it. The Greys River area is considered by many northwest Wyoming locals to be a one of their favorite multiple use playgrounds, the river offers great trout fishing, kayaking, rafting and canoeing and there are many access points along the road to access the river.

MONITORING FREQUENCY

Greys River is sampled from June 7th to August 30th

SOURCE INFORMATION

There is currently very limited water quality monitoring of Idaho's inland swim sites. The federal Beach Act does not cover freshwater or riverine beaches, and states in the Basin do not monitor Snake River swimming beaches or recreational access sites.

As part of its Water Quality Program, Snake River Waterkeeper monitors water quality at more than 100 sites on the Snake River and its tributaries for temperature, dissolved oxygen, pH, salinity/conductivity/total dissolved solids, ammonia, and nitrates. Data are collected at sample sites June-October and assigned safety ratings based on comparison to EPA's Recreational Water Quality Criteria for Human Health:

pH: 5 – 9 µg/L
Salinity/Conductivity/Total Dissolved Solids: 500 mg/L
Nitrates: 10 mg/L

A site is marked Green when single sample results meet all Human Health Criteria.
A site is marked Red when the results are equal to or above Human Health Criteria.
A site is marked Grey when there are no current results or no available information.
Sites found to exceed EPA's Aquatic Health Criteria are noted in site descriptions.

While criteria measured are useful indicators of contamination, there are many other potential sources of pollution that are not reflected in our Swim Guide, including E.coli and other bacteria, heavy metals, pharmaceuticals, fertilizers, and pesticides that harm aquatic life.

Download the free app for smartphone and learn about Swim Guide 3.0 at www.theswimguide.org. To learn more about our efforts to protect and restore the Snake River's water quality, visit www.snakeriverwaterkeeper.org.

WATER QUALITY GRAPH



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