Quick answer: We asked readers in our Facebook group about the biggest mistake first-time Lake Tahoe visitors make, and the thread got more than 200 comments.
The top answers were leaving trash behind, spending the whole trip in a casino, and leaving food in the car where bears can smell it.
Close behind were holiday-weekend crowds, rushed two-day trips, the altitude and sun, cold evenings, winter roads, and the cold lake itself.
Every one of them is easy to avoid once you know about it.
The question went up in our Lake Tahoe Travel Tips Facebook group, and the thread filled up fast.
Below are the mistakes readers mentioned most often, roughly in order, with what to do instead.
1. Leaving trash behind
This was the most-mentioned mistake by a wide margin. Readers in our group are protective of the beaches and trails here, and the thing that bothers them most is visitors who leave wrappers, bottles and cigarette butts behind instead of packing them out.
The fix is simple. Bring a small trash bag to the beach, the trailhead and the picnic table.
If a trash can is already full, take your trash home with you, because an overflowing can draws bears and other animals.
If you leave a spot cleaner than you found it, nobody at the lake will have anything to complain about.
2. Spending the trip inside a casino
The second-biggest theme was people who travel all the way to one of the clearest alpine lakes in the country and then spend most of their time at a blackjack table, eating every meal indoors.
If you enjoy gaming, go ahead. One reader pointed out that casino rewards are what make their Tahoe stays affordable, and they still get outside plenty. The problem is only gaming.
Plan one casino night, and put the lake on the schedule for the rest of the trip: a beach morning, an easy hike, an afternoon on a boat.
3. Leaving food in the car
Black bears at Tahoe know that cars often hold food. They can open unlocked doors, and a cooler left on the back seat is an easy target. The Keep Tahoe Bears Wild campaign lists preventing vehicle break-ins as one of the main ways visitors can help, and local groups like BEAR League share the same advice.
Take everything edible or scented out of the car, including coolers, groceries, trash, sunscreen and lip balm.
Lock the doors and roll the windows up. At campgrounds, use the bear box at your site, and at a rental, bring food inside and close the windows when you leave.
Never feed a bear, on purpose or by leaving food out. The California Department of Fish and Wildlife’s Keep Me Wild program has more on living and visiting safely in bear country.
A bear-proof food locker like the ones at many campsites. Photo: National Park Service, public domain.
4. Coming on the busiest weekend of the year
Readers were close to unanimous on this one. First-timers often pick the Fourth of July, a three-day weekend or a peak ski Saturday, then lose hours to traffic and pay top prices for lodging and dinner.
If your dates are flexible, come midweek or in the shoulder seasons of spring and fall.
If a holiday weekend is the only option, drive up early in the day instead of on Friday afternoon, book lodging and reservations ahead, and plan for traffic rather than hoping to avoid it.
5. Trying to see everything in two days
Overscheduling came up again and again. People try to drive all the way around the lake, stop at five beaches and fit in three hikes over one weekend, and they go home tired.
Stay longer if you can, plan less for each day, and pick one shore as your home base. One beach day with time to swim and eat lunch on the sand is better than four quick stops.
Make sure you get in the water at least once, too. Several readers said the saddest mistake they had seen was a visitor who never touched the lake.
Our post on how many days you need at Lake Tahoe can help you plan the length of your trip.
6. Underestimating the altitude, sun and dry air
Lake Tahoe sits at about 6,225 feet. First-time visitors often get headaches, feel winded on easy trails and get sunburned faster than they expect, because the sun is stronger at this elevation and reflects off the water and snow. The air is dry enough that you can get dehydrated without noticing. Many people also find that drinks hit harder up here.
Take your first day easy. Drink water all day, and wear sunscreen and a hat even when it feels cool. Go slow on cocktails. If you’re coming from sea level, save the big hike for your second or third day instead of the first afternoon.
7. Dressing for the forecast instead of the mountains
A warm afternoon at the lake can turn into a near-freezing evening once the sun goes down, and it has even snowed here in summer. Readers in our group shared stories of shivering through evening events and of visitors caught in snow without boots.
Pack layers in every season. Bring a warm jacket for the evenings, a hat and real shoes you can walk a trail in, and add boots and gloves in winter. Check the forecast before you go, and then pack a little warmer than it suggests.
8. Driving up in winter unprepared
Readers in our group have seen this one many times, usually from behind the traffic jam it causes. A visitor drives up in a storm with two-wheel drive, summer tires and no chains, or has chains but has never put them on.
If you can, drive an all-wheel or four-wheel drive vehicle with good winter tires. Either way, keep chains that fit your tires in the trunk and practice putting them on at home before the trip.
Check Caltrans QuickMap for California roads and Nevada 511 for Nevada roads the morning you drive, and follow chain controls when they are posted. Slow down on snow and ice, because four-wheel drive helps you get moving but does not help you stop.
For more detail, see our winter driving tips, our guide to traveling during winter storms and our chain guide.
A chain control checkpoint during a snowstorm (Oregon I-5, shown as an example). Photo: Oregon Department of Transportation, CC BY 2.0.
9. Expecting the lake to be warm and calm
Lake Tahoe is cold all year. The National Weather Service warns that cold shock, the sudden gasp and fast breathing that happen when you hit cold water, can cause drowning even in strong swimmers, and that water in the 50s and 60s can be just as dangerous as near-freezing water.
Afternoon wind can also come up quickly and catch boat renters far from shore.
Walk in slowly instead of jumping or diving in. Swim close to shore, and put kids in life jackets. Wear a life jacket on a boat, paddleboard or kayak too.
If you rent a boat, go out in the morning, watch the sky and come back in when the wind picks up.
The shallows at Sand Harbor look inviting, but the water is cold even in late summer. Photo: Don Graham, CC BY-SA 2.0.
10. Only seeing the famous spots
Sand Harbor is beautiful, and it is also packed. Nevada State Parks charges a vehicle entrance fee there, and from May 15 to September 30 you need a vehicle reservation to enter before 10:30 a.m. After that, entry is first come, first served, and the lot often fills.
Several readers said the real mistake is showing up without a plan, fighting the crowds, and never seeing anything else. Our Sand Harbor parking and reservations guide covers current fees and how to get in.
Plan your Sand Harbor visit, then add a less famous beach or trail to the trip. Eat a few meals at local restaurants instead of only chains and casino buffets.
If this is your first trip, our first-timer’s guide to Lake Tahoe is a good place to start.
The short version
Pack out your trash, keep food out of the car, avoid holiday weekends if you can, and give yourself a few days instead of two. Pack warm layers, drink plenty of water, carry chains in winter, and treat the cold water with respect. If you save the casino for one night, you will see a lot more of the lake.
Frequently asked questions
What is the biggest mistake first-time Lake Tahoe visitors make?
Readers in our Facebook group named leaving trash behind more than any other mistake. Leaving food in the car, where bears can get to it, and spending the whole trip in a casino came up next most often.
Is Lake Tahoe water always cold?
Yes. The lake stays cold even in late summer, and cold shock can cause drowning even in strong swimmers. Walk in slowly, swim near shore and put kids in life jackets.
Do I need chains to drive to Lake Tahoe in winter?
Chain controls are common on the roads into Tahoe during storms. Carry chains that fit your vehicle, learn to install them before your trip, and check Caltrans QuickMap or Nevada 511 before you drive.
When should I avoid visiting Lake Tahoe?
Major holiday weekends, especially the Fourth of July, and peak ski Saturdays bring the worst traffic, crowds and prices. Midweek trips and the spring and fall shoulder seasons are calmer.
How many days do I need for a first trip to Lake Tahoe?
Readers in our group say two days feels rushed. Three to four days gives you time to see both shores without spending the trip in the car.
Have a first-timer mistake we missed? Share it in our Lake Tahoe Travel Tips Facebook group.