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| Event | Ice-Out |
| Date of Sighting | 04/12/12 |
| Comments | "The lake iced off April 12th. Snow is gone from most open areas in the park and mud season conditions exist. Surrounding USFS roads and trails remain under snow with limited access. " As seen on the Colorado State Parks website. |
| Location | Sylvan Lake |
| State/Province | CO |
| Latitude | 39.48 |
| Longitude | -106.73 |
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