Minnesota · Cass County
Portage Lake Ice-Out Dates
The ice usually goes out of Portage Lake around April 26 — the fourth week of April. Earliest ever: April 21 (2003). Latest: May 19 (2004).
The 2027 season
Tracking resumes when the ice forms.
Every recorded ice-out
7 years on the books, 2002–2020. Newest first.
| Year | Ice-out date |
|---|---|
| 2020 | April 26 |
| 2008 | May 7 |
| 2007 | April 21 |
| 2005 | April 25 |
| 2004 | May 19 |
| 2003 | April 21 |
| 2002 | April 27 |
When Portage freezes over
Portage Lake usually freezes over around November 30 — the fourth week of November. Earliest on record: November 24 (2002–03). Latest: December 14 (2004–05).
A freeze-up crosses New Year, so each row is the winter it belongs to: the winter of 2019–20 froze on December 2. Newest first.
| Winter | Ice-in date |
|---|---|
| 2019–20 | December 2 |
| 2006–07 | November 30 |
| 2004–05 | December 14 |
| 2003–04 | November 25 |
| 2002–03 | November 24 |
Records: Minnesota DNR ice-in records. Last checked August 2026.
Late ice is unpredictable — no date on this page says the ice is safe.
Records: Minnesota DNR ice-out records. Last checked August 2026.