How to Winterize a Big Bear Cabin Before the First Storm
How do you winterize a Big Bear cabin before the first storm?
Big Bear sits at almost 6,800 feet, so pipes are the main risk. If you're there regularly or rent the cabin, keep the heat at 55°F or higher and insulate exposed pipes. If it sits empty, shut off and drain the water at the stop-and-waste valve and add antifreeze to toilets and traps. Then add a smart thermostat for power-outage alerts, clean the gutters, clear paths to your utilities, and winterize sprinklers and hose bibs by November 1.
By Rachael Smith | October 16, 2026
Big Bear sits at almost 6,800 feet.
That one number is why more cabins get wrecked in the first hard freeze of the year than in all the warm months combined.
The worst part is that almost every one of those disasters is preventable with about an afternoon of work.
I own short-term rentals myself, and I used to manage 400 of them. I watched the same story play out over and over. Some owners button up their cabins and never think about it again. Others get a phone call in January with water pouring through the ceiling.
The difference is almost never money or luck. It's a checklist. Here it is, in order.
Step one: protect your pipes
Water is the number one thing that destroys mountain homes in winter. Any pipe exposed to 32°F or colder can freeze, and overnight temperatures in the 20s are a normal week in January.
When water freezes, it expands and splits the pipe. The damage doesn't show up until it thaws and starts flooding. One burst pipe can cost tens of thousands of dollars and leave a cabin unusable, or unrentable, for months.
You've got two paths, and the right one depends on how you use the place. Watch Rachael explain both options at 1:10.
Path A: you're there often, or you rent it
- Keep the heat on and set the thermostat no lower than 55°F, even when you're gone for the week.
- Insulate exposed pipes with foam sleeves or heat tape, especially in crawl spaces, garages, and exterior walls.
That steady, low heat keeps the water moving and the pipes safe.
Path B: the cabin sits empty for weeks
This is most secondary homeowners, plus the gaps between rental bookings. Shutting off and draining the water is the safer play.
- Find your stop-and-waste valve. It's usually a square metal rod in the ground between the house and the meter.
- Shut it off.
- Open every faucet and flush the toilets.
- Pour antifreeze into the toilet bowls and the drain traps so nothing left in the lines freezes.
- Mark the valve with a tall stake.
That last step is the Big Bear detail most people forget. The valve will get buried in three feet of snow, and you will not find it. Watch Rachael walk through the drain-down at 2:17.
One more date to put on your calendar. Rachael notes that the Big Bear Lake Department of Water and Power requires outdoor irrigation winterization from November 1 through April 1, so handle your sprinklers and hose bibs while you're at it. If you're not sure how, ask a local irrigation or plumbing professional, because the right method depends on your system.
Want more Big Bear real estate insights like this? Rachael shares homeowner tips, market updates, and mountain living advice every week on her YouTube channel. Subscribe here so you have the winter checklist before the next storm.
Step two: plan for the power to go out
Here's the part that catches people who think they're already covered.
Keeping the heat at 55°F only works if the power stays on, and winter storms up here knock the power out. If you're relying on the furnace and a storm takes the grid down for a day during a deep freeze, you're right back to frozen pipes.
Don't set it and forget it. The cheapest fix is a smart thermostat that pings your phone the second the temperature inside starts dropping. That gives you time to call a neighbor or a property manager before it becomes a flood.
If the cabin is a serious investment, a standby generator is worth the conversation. Either way, build in a backup so one power outage doesn't undo everything else you did. Watch Rachael cover power and monitoring at 3:12.
Step three: look up at the roof, gutters, and paths
Big Bear gets real snow, 60 to 100 inches in a normal season, and all of it ends up on your roof, your deck, and your gutters.
Before the first storm:
- Clean your gutters so melting snow has somewhere to go. When it refreezes at the roof line, you get ice dams that push water up under your shingles.
- Know what your deck and roof can handle, especially on older cabins, and keep an eye on heavy accumulation through the season.
- Clear a walking path to your meter, your valve, and your propane tank now, while it's still dirt and pine needles instead of two feet of ice.
Watch Rachael go through roof and exterior prep at 3:59.
If you rent your cabin, winter is your season
Ski traffic to Snow Summit and Bear Mountain is what fills a Big Bear rental calendar from December through March.
A frozen pipe in the middle of January doesn't just cost you the repair. It cancels every booking until it's fixed, right when you'd be earning the most.
So give your guests clear heat instructions, and never let them crank the thermostat down to save a few dollars. Have a cold-snap plan and a local contact ready before the season starts, not during it. Watch Rachael explain the rental side at 4:47.
Buying a cabin this fall? Ask these questions
Winter shows you everything summer hides. Before you close on a mountain home, ask about:
- Heat tape and pipe insulation
- The age of the roof
- Where the stop-and-waste valve is
A cabin that's been winterized right for years is a very different purchase than one that's just been getting lucky. If you're writing offers, bring these questions to your inspector too. Watch Rachael share the buyer notes at 5:19.
Three mistakes I see every winter
After years of working this market, the same mistakes keep showing up:
- Turning the heat way down to save money. The savings on a utility bill are small compared with a single burst pipe. If the cabin is occupied or rented, hold the line at 55°F.
- Assuming the power will stay on. The heat only protects you when the grid is up. A smart thermostat is a cheap way to find out early when it isn't.
- Waiting until the first storm. Gutters, valve markers, and cleared paths are all easy in October and miserable in January.
None of these fixes require special skills. They require a free afternoon and a short list, which is why I put it in a video in the first place.
The short version
The cabins that sail through a Big Bear winter aren't the biggest or the newest. They're the ones where somebody took an afternoon in October to get ready.
Pick your path (heat on or water off), mark your valve, add a smart thermostat, clean the gutters, and clear your paths. Do the short list now while it's easy, and you'll spend the season enjoying the snow instead of worrying about it.
If you're unsure whether your cabin is ready, or you're thinking about buying or selling before the snow sets in, start at buyinbigbearlake.com or call 909-744-2190. And subscribe to my YouTube channel for more homeowner tips like this one.
About Rachael Smith
Rachael Smith is a top-producing real estate agent with RE/MAX Big Bear, specializing in mountain homes, short-term rental investments, and luxury properties in Big Bear Lake and surrounding areas. With over a decade of experience and hundreds of homes sold, she helps buyers, sellers, and investors make smart, strategic real estate decisions. Through her strong online presence and data-driven approach, Rachael connects clients with opportunities both on and off the market.
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