When Does Loon Lake Freeze? Typical Ice-In Nov 22, Ice-Out Apr 21
Loon Lake in Cass County, Minnesota usually freezes over around Nov 22, and usually has ice-out around Apr 21, based on Minnesota DNR ice observations recorded between 2004-2008. That works out to roughly 215 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 Loon Lake
| Typical freeze-up (ice-in) | Nov 22 |
| Typical ice-out | Apr 21 |
| Earliest freeze-up on record | Nov 15, 2004 |
| Latest freeze-up on record | Nov 30, 2006 |
| Earliest ice-out on record | Apr 10, 2005 |
| Latest ice-out on record | Apr 28, 2008 |
| Open-water season | ~215 days |
| Winters observed | 6 |
| Location | Cass County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Loon 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 Loon Lake has landed as early as Apr 10, 2005 and as late as Apr 28, 2008 — a spread of weeks around the Apr 21 median. Freeze-up has ranged from Nov 15, 2004 to Nov 30, 2006. 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 Loon Lake is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2004-2008.
Stays via Stay22
Where to stay near Loon Lake
Compare cabins, hotels, and vacation rentals near Loon Lake in Cass County, Minnesota. Live availability and prices for your nights. Switch the map to Satellite to see how close each stay is to the water.
Top-rated places to stay near Loon Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Loon Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Loon Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Loon Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.