When Does the Ice Go Out on Rock Lake? Typical Ice-Out Apr 10
Rock Lake in Crow Wing County, Minnesota usually has ice-out around Apr 10, based on Minnesota DNR ice observations recorded between 2021-2024. These are typical dates across many winters, not a forecast — individual years swing by weeks in either direction.
Ice record for Rock Lake
| Typical ice-out | Apr 10 |
| Earliest ice-out on record | Mar 11, 2024 |
| Latest ice-out on record | May 10, 2022 |
| Winters observed | 10 |
| Location | Crow Wing County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Rock 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 Rock Lake has landed as early as Mar 11, 2024 and as late as May 10, 2022 — a spread of weeks around the Apr 10 median. 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 Rock Lake is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2021-2024.
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