Minnesota · Stearns County
Koronis (main lake) Ice-Out Dates
The ice usually goes out of Koronis (main lake) around April 12 — the second week of April. Earliest ever: April 3 (2004). Latest: April 28 (2023).
April 12Usually around
April 3Earliest ever (2004)
April 28Latest ever (2023)
6Years of record (1984–2023)
The 2027 season
Tracking resumes when the ice forms.
Every recorded ice-out
6 years on the books, 1984–2023. Newest first.
| Year | Ice-out date |
|---|---|
| 2023 | April 28 |
| 2008 | April 25 |
| 2005 | April 8 |
| 2004 | April 3 |
| 2003 | April 12 |
| 1984 | April 13 |
Late ice is unpredictable — no date on this page says the ice is safe.
Records: Minnesota DNR ice-out records. Last checked August 2026.