When Does Boy Lake Freeze? Typical Ice-In Nov 16, Ice-Out Apr 16
Boy Lake in Itasca County, Minnesota usually freezes over around Nov 16, and usually has ice-out around Apr 16, based on Minnesota DNR ice observations recorded between 2007-2018. That works out to roughly 214 days of open water a year. These are typical dates across many winters, not a forecast — individual years swing by weeks in either direction.
Ice record for Boy Lake
| Typical freeze-up (ice-in) | Nov 16 |
| Typical ice-out | Apr 16 |
| Earliest freeze-up on record | Nov 10, 2018 |
| Latest freeze-up on record | Nov 29, 2007 |
| Earliest ice-out on record | Mar 24, 2012 |
| Latest ice-out on record | Apr 28, 2008 |
| Open-water season | ~214 days |
| Winters observed | 16 |
| Location | Itasca County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Boy Lake has usually iced over — it does not tell you the ice is safe, and we hold no thickness measurement for this or any lake. The Minnesota DNR is explicit that no ice is ever completely safe: thickness varies across a single lake, and current, springs, aerators, and insulating snow all weaken it. Ice that held a truck last week may not hold a person today.
Read the ice-thickness guidelines before going out, and check current conditions with the Minnesota DNR ice-safety page and local bait shops, which track conditions lake by lake.
How much the timing varies
Ice-out on Boy Lake has landed as early as Mar 24, 2012 and as late as Apr 28, 2008 — a spread of weeks around the Apr 16 median. Freeze-up has ranged from Nov 10, 2018 to Nov 29, 2007. That year-to-year swing is why a median date is a planning tool, not a schedule. Freeze-up is driven by accumulated cold after the lake turns over in fall; ice-out by late-winter air temperature, sun angle, and how much snow sits on top of the ice reflecting it. The full nutrient and algae breakdown for Boy Lake is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2007-2018.
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