When Does Mud Lake Freeze? Typical Ice-In Dec 1, Ice-Out Mar 25
Mud Lake in Martin County, Minnesota usually freezes over around Dec 1, and usually has ice-out around Mar 25, based on Minnesota DNR ice observations recorded between 2017-2024. That works out to roughly 251 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 Mud Lake
| Typical freeze-up (ice-in) | Dec 1 |
| Typical ice-out | Mar 25 |
| Earliest freeze-up on record | Nov 13, 2018 |
| Latest freeze-up on record | Dec 14, 2017 |
| Earliest ice-out on record | Feb 29, 2024 |
| Latest ice-out on record | Apr 29, 2018 |
| Open-water season | ~251 days |
| Winters observed | 27 |
| Location | Martin County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Mud 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 Mud Lake has landed as early as Feb 29, 2024 and as late as Apr 29, 2018 — a spread of weeks around the Mar 25 median. Freeze-up has ranged from Nov 13, 2018 to Dec 14, 2017. 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. Mud Lake carries an overall water-quality grade of F — the full breakdown is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2017-2024.