Idaho · Lake fishing · Hamilton

Upper Twin Lake

Jun–Sep
best months

Is Upper Twin Lake open right now?

Alert in the area

The Forest Service lists 2 alerts for Bitterroot National Forest.

As of · Source: USFS · Bitterroot National Forest. Agencies don't list every closure — check before you go.

Upper Twin Lake is a 25-acre lake near Hamilton, Montana, at about 6,570 feet. It is managed by the U.S. Forest Service.

  • Best time to go · Jun–Sep

    Best time to visit Upper Twin Lake

    Best months: June–September. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.

    1. Jan

      31° / 10°

      13 wet

    2. Feb

      35° / 12°

      12 wet

    3. Mar

      43° / 20°

      13 wet

    4. Apr

      50° / 25°

      13 wet

    5. May

      61° / 32°

      13 wet

    6. Jun

      70° / 37°

      12 wet

    7. Jul

      81° / 40°

      8 wet

    8. Aug

      81° / 38°

      8 wet

    9. Sep

      70° / 32°

      9 wet

    10. Oct

      54° / 26°

      11 wet

    11. Nov

      38° / 18°

      13 wet

    12. Dec

      29° / 10°

      13 wet

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Sula 14 Ne, MT, 40.5 mi away at 5,155 ft. The station sits about 1,400 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

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