Wolf Point Tribal Park - Flathead Lake

Polson, Montana

Water Temperature on 8/19/2019 = 70.0F (21.1C)

ADOPT-A-BEACH PARTNER: S&K Gaming. Don't forget to visit the KwaTaqNuk Hotel & Casino on the south shore of Flathead Lake in Polson and The Grey Wolf Casino on Evaro Hill on Highway 93 just north of Missoula.

Flathead Lake in northwest Montana is the largest natural freshwater lake west of the Mississippi; slightly larger than Lake Tahoe at 27.3 mi. long, 15.5 mi. wide, and max depth of 370.7 ft.

As one of the cleanest in the world, Flathead Lake is perfect for OPEN WATER SWIMMING! No sharks, no jellyfish, and no lane lanes...just clear, clean, and crisp water!

This swimming area is designated for Confederated Salish & Kootenai Tribal members only. The park has ample parking, but no concessions are available, so bring your own picnic!

Unless you like your water COLD, the effective swimming season is June through September. Average water temps in June are in the 60s, 70s in July and August, and then back down again in September.

Summer air temperatures average in the mid-70s to mid-80s.

Swim Guide shares the best information we have at the moment you ask for it. Always obey signs at the beach or advisories from official government agencies. Stay alert and check for other swimming hazards such as dangerous currents and tides. Please report your pollution concerns so Affiliates can help keep other beach-goers safe.

Beach conditions change constantly, and it is never wise to swim in open water up to 48-hours after a heavy rain. Please use caution!

WATER QUALITY
  • Meets water quality standards
  • Current Status
  • This status is based on the latest sample, taken on August 20th, 2019. Flathead Lake Open Water Swimmers 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:   
MONITORING FREQUENCY

Wolf Point Tribal Park - Flathead Lake is sampled weekly from June 26th to August 28th

SOURCE INFORMATION

Flathead Lake in northwest Montana is the largest natural freshwater lake west of the Mississippi; slightly larger than Lake Tahoe at 27.3 mi. long, 15.5 mi. wide, and max depth of 370.7 ft.. As one of the cleanest in the world, Flathead Lake is perfect for OPEN WATER SWIMMING! No sharks, no jellyfish, and no lane lanes, just clear, clean, and crisp water!

Water at Flathead Lake's bathing beaches is monitored for recreational water quality during effective swimming season: July 1st through September 1st.

In 2017 FLOW Swimmers (Flathead Lake Open Water Swimmers) launched a sampling program of three local beaches. In 2018, the program has grown to 10 beaches around the lake. Samples areprocessed by Flathead Lake Biological Research Station. The water at the bathing beaches will be tested for E.coli

Monitoring Status
Montana follows federal guidelines for the monitoring of its recreational waters.
The guidelines for freshwater levels of E. coli are a geometric mean of 100 cfu per 100 mL and an STV of 320 cfu per 100 mL, measured using EPA Method 1603, or any other equivalent method that measures culturable E. coli.

E. coli
A beach is marked Green when two consecutive single sample results are under a geometric mean of 100 cfu per 100 mL and an STV of 320 cfu per 100 mL

A beach is marked Red when two consecutive single sample results are equal to or above a geometric mean of 100 cfu per 100 mL or aSTV of 320 cfu per 100 mL

A beach is marked Grey if there is no current results or no available information.

WATER QUALITY GRAPH

Wolf Point Tribal Park - Flathead Lake

Polson, Montana

WATER QUALITY
  • Meets water quality standards
  • Current Status
  • This status is based on the latest sample, taken on August 20th, 2019. Flathead Lake Open Water Swimmers 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:   

Water Temperature on 8/19/2019 = 70.0F (21.1C)

ADOPT-A-BEACH PARTNER: S&K Gaming. Don't forget to visit the KwaTaqNuk Hotel & Casino on the south shore of Flathead Lake in Polson and The Grey Wolf Casino on Evaro Hill on Highway 93 just north of Missoula.

Flathead Lake in northwest Montana is the largest natural freshwater lake west of the Mississippi; slightly larger than Lake Tahoe at 27.3 mi. long, 15.5 mi. wide, and max depth of 370.7 ft.

As one of the cleanest in the world, Flathead Lake is perfect for OPEN WATER SWIMMING! No sharks, no jellyfish, and no lane lanes...just clear, clean, and crisp water!

This swimming area is designated for Confederated Salish & Kootenai Tribal members only. The park has ample parking, but no concessions are available, so bring your own picnic!

Unless you like your water COLD, the effective swimming season is June through September. Average water temps in June are in the 60s, 70s in July and August, and then back down again in September.

Summer air temperatures average in the mid-70s to mid-80s.

Swim Guide shares the best information we have at the moment you ask for it. Always obey signs at the beach or advisories from official government agencies. Stay alert and check for other swimming hazards such as dangerous currents and tides. Please report your pollution concerns so Affiliates can help keep other beach-goers safe.

Beach conditions change constantly, and it is never wise to swim in open water up to 48-hours after a heavy rain. Please use caution!

MONITORING FREQUENCY

Wolf Point Tribal Park - Flathead Lake is sampled weekly from June 26th to August 28th

SOURCE INFORMATION

Flathead Lake in northwest Montana is the largest natural freshwater lake west of the Mississippi; slightly larger than Lake Tahoe at 27.3 mi. long, 15.5 mi. wide, and max depth of 370.7 ft.. As one of the cleanest in the world, Flathead Lake is perfect for OPEN WATER SWIMMING! No sharks, no jellyfish, and no lane lanes, just clear, clean, and crisp water!

Water at Flathead Lake's bathing beaches is monitored for recreational water quality during effective swimming season: July 1st through September 1st.

In 2017 FLOW Swimmers (Flathead Lake Open Water Swimmers) launched a sampling program of three local beaches. In 2018, the program has grown to 10 beaches around the lake. Samples areprocessed by Flathead Lake Biological Research Station. The water at the bathing beaches will be tested for E.coli

Monitoring Status
Montana follows federal guidelines for the monitoring of its recreational waters.
The guidelines for freshwater levels of E. coli are a geometric mean of 100 cfu per 100 mL and an STV of 320 cfu per 100 mL, measured using EPA Method 1603, or any other equivalent method that measures culturable E. coli.

E. coli
A beach is marked Green when two consecutive single sample results are under a geometric mean of 100 cfu per 100 mL and an STV of 320 cfu per 100 mL

A beach is marked Red when two consecutive single sample results are equal to or above a geometric mean of 100 cfu per 100 mL or aSTV of 320 cfu per 100 mL

A beach is marked Grey if there is no current results or no available information.

WATER QUALITY GRAPH



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Swim Guide shares the best information we have at the moment you ask for it. Always obey signs at the beach or advisories from official government agencies. Stay alert and check for other swimming hazards such as dangerous currents and tides. Please report your pollution concerns so Affiliates can help keep other beach-goers safe.

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