Lake Diablo is one of Washington states most trafficked tourist destinations. It sits deep inside of the North Cascades National Park with easy access from Highway 20. The activities to explore here are seemingly endless, and in this post I’ll go over a few of my favorite. For more information on hiking, camping, and exploring near Diablo Lake – continue reading below!
Diablo Lake Overview
Diablo Lake is a very popular destination for tourists and locals in Washington State. It’s located inside of the North Cascades National Park and is easily accessible from the Highway 20. There are multiple large parking lots with trails that lead right down to the lake, making this a great spot to visit for people of all ages. There are also bathrooms and picnic tables scattered around the lake. Keep reading for more tips on where to park, what to bring, and different activities in this area.
It’s hard to believe just how blue Lake Diablo is. Before visiting I assumed that the photos people were posting of Diablo Lake were edited. To my surprise, it’s really that blue. According to the National Parks Service, “In summer, the distinctive turquoise color of the lake is the result of suspended fine rock particles refracting sunlight. These rock particles, called glacial flour, enter the lake when rock from the surrounding mountains is eroded by ice and flows into the water through glacial streams. The color is most vibrant on sunny days in July, August, and September when seasonal glacial melt occurs.” Keep this in mind if you find yourself here on an overcast day and see a darker blue.
Bears in the North Cascades National Park
The North Cascades National Park is a beautiful area that’s worth exploring. It’s important to be aware of the wildlife while you are in this area in order to stay safe. There is easy access to remote trails within the park, so stay prepared and follow all of the tips for bear safety below.
It’s not uncommon to see bears in the North Cascades. Most bears that you come across in Washington State will be black bears, but there’s a chance you’ll get to see a grizzly in this area. I always carry bear spray along with me in the North Cascades, and you can purchase my favorite bear spray here!
Make sure that you’re making noise if you’re hiking to keep them aware that you’re coming. Also, follow the Washington Department of Fish and Wildlife’s recommendations for food safety in bear country.
Lake Diablo Weather
The weather at Lake Diablo varies significantly throughout the year, reflecting its mountainous and high-altitude location. During the summer months, the weather is generally mild and pleasant, with temperatures ranging from the mid-60s to mid-70s Fahrenheit. These conditions make it an ideal time for outdoor activities such as hiking, kayaking, and picnicking. In the summer clear, sunny days are common, though occasional thunderstorms can occur, adding to the dramatic atmosphere of the region.
As autumn comes around, the weather at Lake Diablo begins to cool, and the landscape transforms while the colors on the trees change. Temperatures typically range from the 50s to 60s Fahrenheit. This period is perfect for enjoying the lake with smaller crowds before winter sets in. Winter at Lake Diablo brings significant changes, with temperatures often dropping below freezing and snowfall blanketing the area. The lake and its surroundings are transformed into a winter wonderland, attracting those who enjoy the serene beauty of snow-covered landscapes and the challenges of winter sports.
Spring at Lake Diablo is a time of renewal, with temperatures gradually rising and snowmelt feeding the lake and its tributaries. The weather can be quite variable, with a mix of rain and sunshine, and temperatures ranging from the 40s to 60s Fahrenheit. This season offers a unique opportunity to witness the rebirth of the natural environment, as wildflowers bloom and wildlife becomes more active.
Highway 20 Closures
Highway 20, also known as the North Cascades Highway, is a classic route that provides access to Lake Diablo and the surrounding areas. However, due to heavy snowfall and the risk of avalanches, this highway is closed during the winter months. The closure generally occurs in late November, depending on weather conditions, and the highway remains closed until the snow has melted and the road is deemed safe, usually reopening in late April or early May. This seasonal closure ensures the safety of travelers and allows for necessary maintenance and clearing of the roadway, making it safe for the high volume of tourists and locals who travel this scenic route during the warmer months.
Activities
There are many different things to do during your visit to Lake Diablo. Some of my personal favorites include hiking the Thunder Knob trail, camping nearby, and paddle boarding on the lake. Here are more ideas to add to your list when you visit Lake Diablo this year.
- Camping – There are multiple campsites located nearby. Because this is a popular destination in Washington these spots tend to book out quickly, so you’ll want to plan ahead and reserve a campsite early in the year. It’s also worth mentioning that the campgrounds are closed during the late fall – early spring seasons an only open in the summer.
- Swimming – One of my favorite things to do when visiting Lake Diablo is going for a swim. If you’re visiting in the middle of summer you’ll likely be greeted with 80+ degree days. A mid-afternoon dip in the lake is the perfect way to cool down! The temperature of Lake Diablo varies, but it never gets too warm. Expect a cold dip into the lake and make sure you have proper clothing to warm up after. View my favorite hiking towel here.
- Hiking – There are tons of hiking trails around the lake that will offer views of this blue water. Read below for more tips on hiking near Diablo Lake.
- Paddle Boarding – This is an iconic lake to paddle boar or even kayak on! You’re sitting on top of bright blue water and surrounded by amazing mountain views. Plus, Amazon has a ton of inflatable paddle board options that can fit into any sized car!
Camping At Lake Diablo
Camping near Diablo Lake is at a campground called Colonial Creek North Campground. This campground has 41 spots and they fill up quickly! If you’re planning on spending the night at this campground you will need to reserve your spot months in advance. You can view the availability on Recreation.gov.
Some of my favorite camping supplies include:
- Big Agnes Tent – This tent is perfect for anyone wanting an easy setup. I’ve got it dialed in so that it takes me about 5 minutes to set up. It’s primarily meant for backpacking so it packs up very small and is lightweight. This tent comes with a footprint, rain fly, and an AMAZING warranty.
- ThermaRest NeoAir Xlite – Similarly to my favorite tent, my favorite sleeping pad is a backpacking pad. I can’t speak highly enough about this pad! I am a side and stomach sleeper and am able to get into a deep sleep with this pad. Plus, it’s extremely lightweight!
- Foldable chair with a sunshade – I was out fishing one day when I saw someone with this chair. It is the best Washington camping chair ever. It comes with a shade over the seat to protect you from the sun. This shade comes in handy with Washingtons rainy weather!
Diablo Lake Trails
There are many different trails near Diablo Lake. I personally have only hiked the Thunder Knob trail. I felt like it was a great hike, but a little more crowded than I would have preferred. It was a great option if you’re looking for a fast day hike that has killer views. For a detailed overview of the North Cascades National Park, click here. Here are a few different hiking trail options nearby:
- Thunder Knob Trail – 3.6 miles round trip, 630 ft elevation gain
- Diablo Lake Trail – 7.2 miles round trip, 1509 ft elevation gain
- Maple Pass Trail – 6.5 miles round trip, 2162 ft elevation gain
- Easy Pass Trail – 7.4 miles round trip, 3000 ft elevation gain
Food Nearby
Food can be hard to come by near Lake Diablo. Your only real options are to forage for berries or mushrooms. No, I’m totally joking. If you’re visiting the lake there are a few options for you, but you’ll have to plan ahead!
On your drive to Diablo Lake coming from the west side of Highway 20 you’ll pass through a couple of towns. Depending on your route, you’ll go through Darrington, Concrete, and Marblemount. These are all very small towns with limited options but I’ve had a chance to try most of the restaurants and can tell you where to go!
Darrington
This is one of my absolute small towns in the state. There’s a whopping population of 1400 people! The town sits at the base of Glacier Peak and Whitehorse peak offering beautiful mountain views during your visit. As far food goes there are two places I like to stop at.
- Moe’s Coffee – The coffee and food at Moe’s is amazing! I always stop for a latte and a bagel sandwich on my way up to Diablo Lake.
- The Burger Barn – Located across the street from Moe’s, you’ll find The Burger Barn. They offer classic burgers, fries, and delicious milk shakes.
- The last option is to stop off at the grocery store in town! This will be your last grocery store available on the drive into the North Cascades so be sure to stock up on the essentials.
Concrete
If you drive through Sedro Wooley you’ll likely be passing through Concrete. This is truly a small town with not a lot going on. The population of Concrete Washington is right around 800 people! This feels so tiny when compared to the population of Seattle, 749,256 in 2022. Here are the food options in Concrete, Washington:
- Hub Bar & Grill – I haven’t personally visited this bar and grill, but they have great online reviews! You can stop by for a drink or a burger on your way home from the North Cascades National Park.
- The Lonestar – I used to get food at Lonestart when I was working as a raft guide on the Skagit River. It’s a great spot to stop if you’re looking for classic American diner food. There isn’t anything spectacular about this restaurant, but they’re reliable and I’ve always had pretty good experiences. Last time I ate here I got their breakfast burrito and was impressed by the size and taste.
- 5 B’s Bakery and Eatery – If you’re driving through Concrete, you’ve got to stop by and grab some coffee and baked goods here! Everything I’ve tried was amazing, and it’s the last really yummy stop before hitting the North Cascades.
Marblemount
As you get closer and closer to Lake Diablo the towns begin to dwindle down in size. Marblemount has a population of only 190 people! This small community is primarily driven by tourism, thanks to its proximity to the North Cascades National Park and the Skagit River, which attract outdoor enthusiasts for activities such as hiking, fishing, and rafting. Additionally, local businesses, including lodging, dining, and retail shops, play a significant role in the town’s economy by catering to visitors. The area’s natural beauty and recreational opportunities are key factors sustaining its economic vitality. Luckily, there are a few food options for you in Marblemount and they’re listed below.
*** One thing to note about the food in Marblemount is that the hours can be wrong online. I’ve done a quick google search to see what’s open in the past, and when I showed up they were closed. I believe that since this is such a small town sometimes they end up closing if they’re not busy. Don’t rely on the businesses in Marblemount for your only food!
- Karina Deja Brew: This coffee shack is stocked with the basics. You can get just about any coffee or tea drink you’re desiring, and they have a few baked good options available for food.
- Upriver Grill & Taproom – This is a good spot to eat if you’re wanting a good burger and fries. It’s higher quality than your typical burger shack, but nothing too fancy. I really enjoy the location of this restaurant and love eating outside near the Skagit river.
Conclusion
Lake Diablo, a stunning gem within the North Cascades National Park, is a premier tourist destination in Washington State. Easily accessible from Highway 20, it offers visitors a range of outdoor activities amidst breathtaking natural beauty. The lake’s striking turquoise color, most vivid during the summer months, enhances its appeal, making it a favorite spot for hiking, kayaking, and picnicking. Seasonal changes add to the charm and variety of experiences available at Lake Diablo, from vibrant autumn landscapes to serene winter scenes. Nearby small towns, supported by tourism, provide essential amenities and enrich the visitor experience. Whether you’re planning a summer adventure or a peaceful retreat, Lake Diablo promises an unforgettable experience amidst Washington’s rugged wilderness.