Colorado · Lake fishing · Mosca

Cotton Lake

May–Sep
best months

Is Cotton Lake open right now?

Alert in the area

The National Park Service lists 2 alerts for Great Sand Dunes National Park.

  • Creek Crossings on Medano Pass Primitive Road Have Deep and Swift Water

    Park alert covering Great Sand Dunes National Park · NPS · Great Sand Dunes National Park

  • Speed Limits are Much Lower Inside Park than Surrounding Highways

    Park alert covering Great Sand Dunes National Park · NPS · Great Sand Dunes National Park

As of · Source: NPS · Great Sand Dunes National Park. Agencies don't list every closure — check before you go.

Cotton Lake is a 20-acre lake near Mosca, Colorado, at about 7,536 feet.

  • Best time to go · May–Sep

    Best time to visit Cotton Lake

    Best months: May–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

      33° / 11°

      5 wet · 5 snow

    2. Feb

      39° / 16°

      5 wet · 5 snow

    3. Mar

      48° / 24°

      6 wet · 5 snow

    4. Apr

      56° / 29°

      6 wet · 4 snow

    5. May

      66° / 38°

      7 wet · 1 snow

    6. Jun

      77° / 48°

      6 wet

    7. Jul

      81° / 52°

      10 wet

    8. Aug

      78° / 50°

      11 wet

    9. Sep

      72° / 44°

      7 wet

    10. Oct

      60° / 33°

      5 wet · 2 snow

    11. Nov

      45° / 22°

      4 wet · 4 snow

    12. Dec

      34° / 12°

      5 wet · 5 snow

    Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Great Sand Dunes Np & Preserve, CO, 10.9 mi away at 8,183 ft. The station sits about 600 ft higher than this place, so expect it a little warmer here. Source: NOAA NCEI U.S. Climate Normals 1991–2020.

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