When Does Bass Lake Freeze? Typical Ice-In Dec 2, Ice-Out Apr 23
Bass Lake in Itasca County, Minnesota usually freezes over around Dec 2, and usually has ice-out around Apr 23, based on Minnesota DNR ice observations recorded between 2012-2023. That works out to roughly 223 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 Bass Lake
| Typical freeze-up (ice-in) | Dec 2 |
| Typical ice-out | Apr 23 |
| Earliest freeze-up on record | Nov 8, 2023 |
| Latest freeze-up on record | Dec 27, 2015 |
| Earliest ice-out on record | Mar 28, 2012 |
| Latest ice-out on record | May 14, 2013 |
| Open-water season | ~223 days |
| Winters observed | 35 |
| Location | Itasca County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Bass 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 Bass Lake has landed as early as Mar 28, 2012 and as late as May 14, 2013 — a spread of weeks around the Apr 23 median. Freeze-up has ranged from Nov 8, 2023 to Dec 27, 2015. 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 Bass Lake is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2012-2023.
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