Minnesota · Cass County
Long (Main Basin) Lake Ice-Out Dates
The ice usually goes out of Long (Main Basin) Lake around April 18 — the third week of April. Earliest ever: April 11 (2006). Latest: May 4 (2008).
The 2027 season
Tracking resumes when the ice forms.
Every recorded ice-out
7 years on the books, 2002–2008. Newest first.
| Year | Ice-out date |
|---|---|
| 2008 | May 4 |
| 2007 | April 21 |
| 2006 | April 11 |
| 2005 | April 13 |
| 2004 | April 18 |
| 2003 | April 16 |
| 2002 | April 22 |
When Long (Main Basin) freezes over
Long (Main Basin) Lake usually freezes over around November 30 — the fourth week of November. Earliest on record: November 25 (2003–04). Latest: December 18 (2001–02).
A freeze-up crosses New Year, so each row is the winter it belongs to: the winter of 2008–09 froze on November 25. Newest first.
| Winter | Ice-in date |
|---|---|
| 2008–09 | November 25 |
| 2007–08 | November 30 |
| 2006–07 | December 1 |
| 2005–06 | November 30 |
| 2004–05 | December 14 |
| 2003–04 | November 25 |
| 2002–03 | November 26 |
| 2001–02 | December 18 |
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.