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Routes
Hikes
United States
Washington
Whatcom County

Ross Lake National Recreation Area

Routes
Hikes
United States
Washington
Whatcom County

Ross Lake National Recreation Area

The best walks and hikes in Ross Lake National Recreation Area

4.5

(40)

755

hikers

30

hikes

Hikes in Ross Lake National Recreation Area navigate a landscape defined by the Skagit River and its three reservoirs: Ross, Diablo, and Gorge Lake. The region's terrain features dense forests, cascading waterfalls, and trails that ascend to high alpine meadows. Many routes offer views of the surrounding glacier-carved peaks of the North Cascades, which contribute to the distinct color of the lakes.

Best hiking trails in Ross Lake National Recreation Area

  • The most popular hiking route is Diablo Lake Ferry via Diablo Lake Trail — Ross Lake National Recreation Area, a 8.1 mile (13.0 km) trail that takes about 4 hours 55 minutes to complete. This moderate route provides views of Diablo Lake and the surrounding peaks.
  • Another top favourite among local hiking enthusiasts is Sourdough Mountain Lookout from Diablo — North Cascades National Park, a difficult 10.3 mile (16.5 km) path. The trail climbs steeply through forests and alpine meadows to a historic fire lookout.
  • Local hiking enthusiasts also love the Happy Creek Falls Trail — Ross Lake National Recreation Area, a 2.7 mile (4.3 km) trail leading through a forest setting, often completed in about 1 hour 20 minutes.
  • Hiking in Ross Lake National Recreation Area is defined by lakeside paths, old-growth forests, and ascents to alpine viewpoints. The trail network offers routes for different ability levels, from short forest walks to challenging mountain climbs.
  • The routes in Ross Lake National Recreation Area are highly rated by the komoot community with an average score of 4.4 stars from over 50 reviews. More than 1,000 hikers have used komoot to explore Ross Lake National Recreation Area's varied terrain.

Last updated: May 28, 2026

5.0

(1)

25

hikers

#1.

Thunder Knob Trail

3.02km

00:56

180m

0m

Embark on the easy Thunder Knob Trail, a 1.9 miles (3.0 km) hike that takes about 56 minutes to complete, with a gentle 596 feet (182 metres) of elevation gain. You will begin by winding through a lush, moss-covered forest, following the turquoise Colonial Creek. Cross a unique "1-At-a-Time" footbridge before the path ascends into drier lodgepole pine forests. The route offers several viewpoints with expansive vistas of Diablo Lake and alpine peaks like Sourdough Mountain. The vibrant turquoise hue of Diablo Lake, visible from the summit benches, is a striking feature.

This family-friendly route is well-maintained, making it suitable for a wide range of hikers. You can find parking conveniently located near the Colonial Creek Campground, which serves as the starting point for your adventure. Its lower elevation also makes it a good option for hiking during the off-season, when higher trails might still be covered in snow.

Located within the Ross Lake National Recreation Area, the Thunder Knob Trail is notable for its unique views of Diablo Lake. The lake's distinctive turquoise color is caused by glacier-scraped rock flour, a natural phenomenon that sets this landscape apart. It is a popular route, offering a chance to experience the region's natural beauty even when other, higher elevation trails are inaccessible.

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Easy

5

hikers

Hike the easy 3.3-mile East Bank Trail to Hidden Hand Camp in Ross Lake National Recreation Area, gaining 356 feet with lake views.

Easy
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4

hikers

21.4km

06:23

680m

490m

Hike the difficult Thunder Creek Trail in North Cascades National Park, covering 13.3 miles with stunning glacial views and turquoise water.

Hard

Hike the moderate Fourth of July Pass via Thunder Creek Trail, covering 5.1 miles with 2350 feet of elevation gain in North Cascades Nationa

Moderate

1

hikers

1.13km

00:21

0m

110m

Hike the easy 0.7-mile Ross Dam Trail in Ross Lake National Recreation Area for expansive views of the lake and surrounding peaks.

Easy
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Tips from the Community

Andrus
January 7, 2025, Hidden Hand Camp and Viewpoint

HIdden Camp is accessible via the East Bank Trail and backcountry permits are available here: https://www.nps.gov/noca/planyourvisit/permits.htm Just past the campsite is an amazing view of Ross Lake that is worth the hike even if you're not staying overnight.

0

0

Take a seat on the wooden bench and enjoy the amazing view over Diablo Lake. Its turquoise color is especially brilliant on the sunny day.

2

0

The Thunder Knob Trail will lead you to this nice view over turquoise Diablo Lake and the towering mountains around it.

1

0

The Fourth of July Trail is a popular trail especially early in the season since the pass is one of the first to be free of snow. There are some official camps along the trail and beautiful streams.

1

0

In the heart of the Cascades you can take a hike along the rushing Thunder Creek. You can follow the trail and the creek for just a few minutes or dive deeper into the stunning landscape. There are miles and miles that will take you into the beauty of the backcountry.

4

0

Part of Colonial Creek Campground

0

1

Beautiful hike with a few meters of altitude and a beautiful view of Diablo Lake in the North Cascade National Park

Translated by Google

0

1

Nick
May 23, 2019, Bridge

The bridge moves a little when you are walking on it but it's completely safe.

0

0

Frequently Asked Questions

Are dogs allowed on the hiking trails in Ross Lake National Recreation Area?

No, dogs are generally not permitted on the hiking trails within Ross Lake National Recreation Area and the broader North Cascades National Park Complex. They are typically only allowed on paved areas and in campgrounds. It's always best to check the latest regulations on the official National Park Service website before your visit.

What are some good, easy hikes for families or beginners?

For a gentle introduction to the area's scenery, the Happy Creek Falls Trail is an excellent choice. It's a short, relatively flat walk through a beautiful old-growth forest alongside a creek, making it perfect for families with children or those looking for a less strenuous outing.

When is the best time of year to hike in this area?

The primary hiking season is from July through September when the high-elevation trails are most likely to be snow-free. Lower elevation trails can often be hiked from spring through fall. Always check current trail conditions and weather forecasts before you go, as mountain weather can change quickly.

Do I need a permit to hike in Ross Lake National Recreation Area?

For day hiking, you generally do not need a permit. However, a Northwest Forest Pass or equivalent is required for parking at most trailheads. For any overnight trips, including backpacking or boat-in camping, a backcountry permit is mandatory. These can be very competitive for popular areas, so it's wise to plan ahead.

Are there any trails with waterfalls?

Yes, waterfalls are a common feature in the region's landscape. The popular Diablo Lake Trail leads to impressive waterfalls, and many other trails feature cascades, especially during the spring and early summer snowmelt.

What are the parking options for the Ross Dam Trail?

The Ross Dam Trail begins at the Ross Dam Trailhead, located directly off the North Cascades Highway (WA-20). There is a designated parking area here which is a popular starting point for hikers. It provides direct access to the trail leading down to the dam.

Which trails offer the best views of Diablo Lake?

For an immersive experience, the Diablo Lake Trail meanders along the shoreline, offering continuous views of the turquoise water. For a more strenuous climb with spectacular panoramic views from above, the Sourdough Mountain Lookout trail rewards hikers with a breathtaking vista of Diablo Lake and the surrounding peaks.

Are there any options for multi-day backpacking trips?

Yes, the area is excellent for backpacking. The East Bank Trail is a versatile option that follows the shore of Ross Lake, providing access to numerous boat-in and backcountry campsites. It can also be used to connect to more strenuous routes like the Desolation Peak Trail for a longer adventure. Remember that backcountry permits are required for all overnight stays.

How many hiking trails are available in the area?

There are over 25 designated hiking trails in and around Ross Lake National Recreation Area. These range from short, easy nature walks to challenging, multi-day mountain ascents, offering options for every skill level.

What makes the lakes in this area so turquoise?

The distinctive color of Ross Lake, Diablo Lake, and Gorge Lake comes from 'rock flour' — fine particles of rock ground up by the surrounding glaciers. This glacial silt is carried into the lakes by meltwater streams and remains suspended, reflecting sunlight to create the vibrant turquoise hue.

Are there any particularly challenging hikes for experienced mountaineers?

Absolutely. The Thornton Lakes Trail is a difficult route that involves significant elevation gain to reach a series of stunning alpine lakes. For a true test of endurance with historic significance, the Desolation Peak Trail offers a strenuous climb to the fire lookout where writer Jack Kerouac once worked.

What do other hikers enjoy most about Ross Lake National Recreation Area?

The area is highly rated by the komoot community. Reviewers frequently praise the dramatic scenery, especially the contrast between the turquoise lakes and the rugged, glacier-carved peaks of the North Cascades. The well-maintained trails that wind through old-growth forests are also a common highlight.

Most popular routes in Ross Lake National Recreation Area

Easy hikes in Ross Lake National Recreation Area

Most popular attractions in Ross Lake National Recreation Area

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