Whether it’s the allure of the Rocky Mountains, the vibrant art scene, or simply the excitement of exploring a new city, Denver has a lot to offer. As someone who’s made a few trips to the Mile High City, I can tell you it’s an awesome place to visit.

But do you know what not to do in Denver? Here are a few common mistakes first-time visitors tend to make. Trust me, a little insider knowledge goes a long way in making your experience even better.

In this guide, I’ll walk through what not to do on your first trip to Denver, so you can avoid the usual pitfalls and make the most of your adventure.

1. Don’t Underestimate the Altitude

One of the biggest things to keep in mind when visiting Denver is the altitude. Denver is, after all, the Mile High City, which means you’re literally a mile above sea level. This can have a surprising effect on your body, especially if you’re coming from a much lower altitude.

Take It Easy: When I first got to Denver, I was so excited to explore that I didn’t think much about the altitude. I thought, “How different can it be?”

Well, a few hours later, I was feeling lightheaded and sluggish, and I realized I hadn’t been drinking enough water. Denver’s thinner air means there’s less oxygen, so your body has to work a bit harder.

This is especially true if you’re planning on doing any hiking or outdoor activities.

Hydrate, Hydrate, Hydrate: The dry mountain air can dehydrate you faster than you might expect. Be sure to bring a refillable water bottle, and drink plenty of water throughout your trip, and don’t overdo it the first day or two.

Give yourself some time to adjust to the altitude, and you’ll be much more comfortable.

2. Don’t Forget Sunscreen

It might not be the first thing you think of when packing for a city trip, but Denver’s high altitude also means the sun is stronger than at lower elevations.

Always Wear Sunscreen: Make sure to apply sunscreen every day, even if you’re just walking around the city. The higher elevation means you’re closer to the sun, and the UV rays are more intense.

I remember walking around the Denver Botanic Gardens one afternoon and thinking, “It’s not that hot out; I’ll be fine.” Nope—ended up with a red face and a newfound respect for the Colorado sun.

Bring Sunglasses and a Hat: Along with sunscreen, sunglasses and a hat are great ways to protect yourself from the intense sun. Trust me, your skin and eyes will thank you later.

3. Don’t Try to See Everything in One Trip

Denver has a ton to offer, from the great outdoors to world-class museums, trendy neighborhoods, and amazing food. It can be tempting to try and fit everything into one trip, especially if you’re on a tight schedule. But trying to see it all in one go will only leave you feeling exhausted.

Pick a Few Key Attractions: Rather than trying to do it all, focus on a few must-see spots that really interest you.

For example, if you’re into art, make sure to visit the Denver Art Museum. If you love the outdoors, spend a day at Red Rocks Amphitheatre or take a drive up to Mount Evans.

Prioritize what excites you the most, and leave some room for spontaneity.

Enjoy the Local Vibe: One of the best things about Denver is its laid-back atmosphere. Don’t feel like you need to rush from one tourist attraction to the next. Instead, take some time to explore the local neighborhoods, grab a coffee at a cute café, or just sit and people-watch at Union Station.

Sometimes the best travel memories come from the unplanned moments.

4. Don’t Miss Out on the Great Outdoors

While Denver is a bustling city, it’s also a gateway to some of the most beautiful outdoor scenery in the country. The Rocky Mountains are practically in Denver’s backyard, so don’t make the mistake of staying in the city the whole time.

Plan a Day Trip to the Mountains: Whether you’re into hiking, skiing, or just taking in the views, you won’t want to miss the opportunity to explore the great outdoors.

A drive up to Rocky Mountain National Park is an absolute must, and if you’re not much of a hiker, you can still enjoy the scenery from the comfort of your car.

On one of my first trips, I spent the day driving up to Estes Park and then did a short hike in the national park—it was easily the highlight of my visit.

Check the Weather: The weather in the mountains can change quickly, so make sure you’re prepared. Even if it’s warm in Denver, it might be much colder up in the mountains. Pack layers and always check the forecast before heading out.

5. Don’t Assume All Weed Is the Same

Denver is famous for its legal cannabis industry, and if that’s something you’re curious about, there are plenty of dispensaries where you can purchase marijuana legally.

However, if it’s your first time, don’t make the mistake of assuming all weed is the same or that you’ll have the same tolerance as you might in a state where it’s not as potent.

Ask Questions at the Dispensary: If you decide to check out a dispensary, don’t be afraid to ask questions. The staff is usually super knowledgeable and can help you choose a product that’s right for your experience level.

Edibles, in particular, can be much stronger than you might expect, so start with a small amount and give it time before taking more.

Be Mindful of Where You Can Use It: Remember that while cannabis is legal in Colorado, there are still rules about where you can consume it. You can’t smoke in public places like parks or sidewalks, so make sure you know the local laws to avoid any fines.

6. Don’t Rely Solely on Public Transportation

Denver has a decent public transportation system, but it’s not the most efficient way to get around the city, especially if you want to explore the surrounding areas.

Consider Renting a Car: If you’re planning to explore beyond downtown Denver, renting a car might be the best option. This is especially true if you’re heading into the mountains or to places like Red Rocks.

Plus, parking in Denver is generally easier and cheaper than in other major cities, so having a car gives you more flexibility.

Use Ride-Sharing Apps: If you don’t want to rent a car, apps like Uber and Lyft are widely available in Denver and can be a more convenient way to get around than waiting for public transit.

Just be aware that prices can surge during peak times, especially around major events or when there’s bad weather.

7. Don’t Forget About the Altitude and Alcohol

If you enjoy a good craft beer (and Denver has plenty of it), just remember that alcohol hits a bit harder at high altitude. I learned this the hard way on a night out at one of Denver’s many breweries.

Take It Easy on the Drinks: You might feel the effects of alcohol more quickly than you’re used to, so take it slow, especially if you’re still adjusting to the altitude. The combination of altitude and alcohol can make even seasoned drinkers feel it a little more than usual. If you want to be extra safe, carry a keychain breathalyzer.

Stay Hydrated (Again): Along with drinking in moderation, make sure to keep sipping water throughout the night. Trust me, a headache-free morning is worth it!

8. Don’t Ignore the Local Food Scene

Denver has an amazing food scene, and it would be a shame to miss out on some of the local culinary gems. While the city is known for its craft beer, it’s also home to incredible restaurants and unique eats.

Try the Green Chile: One of Denver’s signature dishes is green chile, and you’ll find it smothered on everything from burritos to fries. It’s a must-try when visiting the city. I didn’t know much about it before my first trip, but after one bite, I was hooked.

Explore the Neighborhoods: Denver’s food scene is diverse, and some of the best restaurants are tucked away in the city’s neighborhoods.

Check out places like RiNo (River North) for trendy eateries or South Pearl Street for a more relaxed, local vibe.

And if you’re into food trucks, Denver has a thriving food truck scene with plenty of delicious options.

9. Don’t Assume Denver Is Always Cold

Yes, Denver can get cold in the winter, but the city actually enjoys over 300 days of sunshine a year, and the weather can be pretty unpredictable.

Check the Weather Before You Go: Denver’s weather can change quickly, and it’s not uncommon to experience all four seasons in one day. Be sure to check the forecast before you pack, and bring layers so you’re prepared for anything.

Pack for All Occasions: Even in the winter, you might have sunny days where a heavy coat feels too much. Conversely, summer evenings can be cool, especially if you’re spending time in the mountains.

Layers and a lightweight jacket are your best friends when visiting Denver.

10. Don’t Forget to Explore Beyond Denver

While Denver itself has plenty to offer, the surrounding areas are just as incredible and worth exploring. One of the biggest mistakes people make on their first trip is thinking Denver is the only highlight.

While the city is fantastic, don’t limit yourself to just urban adventures. There’s a whole world waiting just outside the city limits.

Take a Drive to Boulder: Just about 30 minutes from Denver, Boulder is a picturesque college town nestled at the base of the Flatirons. It’s perfect for a day trip if you want to explore more outdoor activities or visit Pearl Street Mall for a mix of shops, street performers, and great food.

Visit Golden or Evergreen: Both Golden and Evergreen are charming mountain towns close to Denver that offer a slower pace and great access to nature.

Golden, in particular, has a rich history with its famous Coors Brewery and scenic hikes like Lookout Mountain.

Evergreen, on the other hand, is perfect for a quiet retreat with beautiful trails and a peaceful lake that’s ideal for paddleboarding in the summer or ice skating in the winter.

Take the Train to Glenwood Springs: If you have a bit more time and want a unique experience, consider taking Amtrak’s California Zephyr train to Glenwood Springs, famous for its hot springs and stunning mountain views.

The train ride itself is incredibly scenic, and it’s a relaxing way to see some of Colorado’s best landscapes without having to drive.

11. Don’t Assume You’ll Be Fine Without Reservations

Denver has become an increasingly popular destination in recent years, and that means restaurants, activities, and accommodations can fill up fast—especially on weekends or during peak travel seasons.

Don’t make the mistake of thinking you can just show up and expect to get a table or a spot on a tour.

Make Restaurant Reservations in Advance: If there’s a specific restaurant you’ve been eyeing, especially in trendy areas like LoDo (Lower Downtown) or RiNo, it’s a good idea to make reservations in advance.

I’ve had a few trips where I was set on trying a particular place, only to find that the wait was hours long or fully booked. With a quick online reservation, you can avoid that disappointment.

Book Popular Tours Early: If you’re planning to visit some of the major attractions around Denver, like a brewery tour, a day trip to a national park, or even a Red Rocks concert, make sure to book your tickets early.

Red Rocks concerts in particular can sell out quickly, so if that’s on your list, get your tickets as soon as you can.

Consider Staying in an Airbnb: Hotels in downtown Denver can get pricey, especially during big events or festivals. Consider looking at Airbnb options in surrounding neighborhoods like Capitol Hill, Highland, or Sloan’s Lake.

Not only can you find some more affordable places, but you’ll also get a chance to experience the local neighborhoods like a Denverite.

12. Don’t Overlook the Traffic and Parking

Like any major city, Denver has its share of traffic issues, especially during rush hour or when there are big events going on. While it’s not as bad as some other cities, it’s still something to keep in mind, especially if you’re planning on driving around.

Avoid Rush Hour if You Can: Denver’s rush hour typically falls between 7-9 AM and 4-6 PM, and it can get pretty congested on highways like I-25 and I-70.

If you can, try to plan your driving outside of these times, especially if you’re heading to the mountains where traffic can get even worse.

Be Prepared for Mountain Traffic: If you’re driving into the mountains on a weekend, especially during ski season, prepare for traffic on I-70. It’s one of the main arteries leading into the Rockies, and it can back up quickly. If you want to avoid gridlock, leave early!

Check Parking Options Ahead of Time: Parking in downtown Denver can be tricky, especially near popular attractions like Union Station, Coors Field, or the Denver Zoo. Look up parking garages or street parking options before you go, and consider using a parking app to find available spots.

Better yet, if your plans allow, opt for walking, biking, or using ride-share apps to avoid the parking hassle altogether.

13. Don’t Miss Out on Denver’s History and Culture

Denver may be known for its modern, outdoor-centric vibe, but it’s also steeped in history and culture. Skipping the cultural side of Denver is like missing half of what the city has to offer. 

Even if you’re more interested in nature or food, mixing in a bit of history and culture can really enhance your trip.

Visit the History Colorado Center: This museum offers interactive exhibits that are perfect for learning about Colorado’s history, from Native American cultures to the Gold Rush and beyond. It’s a fun and informative way to spend a few hours and get a deeper understanding of the state.

Explore the Molly Brown House: Remember “The Unsinkable Molly Brown” from the Titanic? Her Denver home is a quirky and fascinating museum that gives you a glimpse into the life of one of Colorado’s most famous historical figures.

Check Out Denver’s Street Art: If you’re into art, don’t miss the street art in the RiNo (River North) Arts District. It’s one of the coolest areas in Denver, with colorful murals, galleries, and local shops. I stumbled upon it by accident during my first trip and ended up spending way more time there than I expected.

14. Don’t Forget to Plan for the Weather

Denver’s weather can be a bit of a wildcard, especially if you’re visiting during the fall or spring when temperatures can swing dramatically in a single day. Don’t make the mistake of thinking it’ll be cold or warm the entire time—you need to be ready for anything!

Layer Up: Regardless of the season, layers are your best friend in Denver. The mornings might start off chilly, but by midday, you could be peeling off your jacket.

Pack for Sudden Changes: Even in the summer, it’s not unusual to see a quick rain shower or cooler temps in the evening. In the winter, Denver might be sunny and dry, but the mountains could be snowy and icy.

Make sure to check the weather before you head out each day and pack a small umbrella or light jacket just in case.

15. Don’t Ignore the Locals’ Tips

One of the best things about visiting Denver is how friendly and helpful the locals are. They know the ins and outs of the city and are usually more than happy to share their favorite spots or insider tips.

Don’t be shy about asking for recommendations—you’ll often end up discovering hidden gems you wouldn’t find in a guidebook.

Chat with Your Waiter or Bartender: I’ve gotten some of the best recommendations for restaurants, bars, and activities just by chatting with the staff at a local café or brewery. They usually know the best spots that aren’t overrun with tourists.

Ask for Hiking or Outdoor Advice: If you’re planning on doing any hiking or outdoor activities, locals can give you great advice on the best trails or how to avoid crowded spots.

Final Thoughts

Denver is an incredible destination for beginner and intermediate travelers alike, but like any city, it comes with its quirks. By avoiding these common mistakes, you’ll set yourself up for an unforgettable trip.

Whether it’s the high altitude, unpredictable weather, or over-ambitious itinerary, a little bit of preparation goes a long way in making sure you have a smooth, enjoyable experience.

Remember to take it easy, stay hydrated, explore beyond the city limits, and embrace the local culture. And most of all, have fun! Denver has so much to offer, and with these tips in mind, you’re sure to have a trip that’s filled with amazing memories and plenty of adventures.

Safe travels, and enjoy every moment of your first trip to Denver!