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MTB trails
United States
Washington

King County

The best MTB trails in King County

4.9

(226)

2,845

riders

108

rides

If you've ever tried to plan mountain biking in King County, you know how overwhelming the options can be. With so many trails and parks, it's tough to tell which routes are genuinely worth your time and effort, and which are just filler. That's where we come in. Our komoot community has ridden, mapped, and reviewed countless mountain bike trails across the region, and we've distilled it down to the absolute best, saving you the guesswork. With an average score of 4.8 stars from over 230 reviews, you can trust these recommendations.

King County is a mountain biker's playground, defined by the challenging Issaquah Alps, lush evergreen forests of Douglas fir and western hemlock, and extensive trail networks. You'll find everything from easy loops to difficult technical descents. The region splits into distinct zones, from the challenging terrain around Tiger Mountain and Raging River State Forest to the flowing trails of Duthie Hill and the cross-country heartland of the Maple Valley lowlands. Expect varied landscapes that offer a wide array of experiences, often winding through scenic wetlands and alongside small lakes.

If you're looking for a true challenge with technical sections, we'd start with the Master Link and Predator Loop, a difficult 5.9 miles (9.4 km) route that really tests your skills. For a longer, flowing ride through pristine forest, the Grand Ridge Trail is a fantastic moderate option at 14.9 miles (23.9 km), connecting seamlessly to the Duthie Hill network. Ready to hit the trails? Dive into our curated selection and discover why more than 2,900 mountain bikers have already used komoot to explore King County's varied terrain.

Last updated: May 10, 2026

5.0

(1)

37

riders

#1.

Master Link and Predator Loop

9.44km

01:14

420m

420m

The Master Link and Predator Loop offers a quintessential Tiger Mountain mountain biking experience, blending a sustained climb through lush, shaded forests with an exhilarating, technical downhill. You'll ascend the smooth Master Link Trail, winding past boulders and bridges, before dropping into the aggressive terrain of Predator. This downhill-specific trail is packed with steeps, roots, berms, and rock gardens, including notable features like the "Dr. Rockso roll," providing a high-octane ride for advanced cyclists.

This difficult 5.9-mile (9.4 km) loop, with its 1383 feet (422 metres) of elevation gain, typically takes around 1 hour and 14 minutes to complete. It's crucial to note that Predator is a double black diamond trail, best suited for advanced riders with an all-mountain bike (around 150mm travel). While the trail holds up well year-round, even in rain, wet conditions can significantly amplify the challenge of its off-camber root gardens.

Predator is widely considered one of the best trails at Tiger Mountain, built with thousands of volunteer hours as the area's first downhill-only mountain bike trail. It's a destination ride in the Seattle area, known for its fast, technical, and flowy nature. The Master Link provides a dedicated climbing route, allowing riders to access the upper mountain trails and experience this iconic descent without grinding up forest roads.

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Hard

This Tiger Mountain loop is a fantastic mountain biking challenge that weaves through towering evergreen forests, offering a dynamic mix of terrain. You'll encounter everything from fast, flowy sections on trails like Joyride to technical rock gardens and root drops on Off-The-Grid, all while enjoying shaded green views and occasional glimpses of Mount Rainier from the higher points. The route provides a true journey through the diverse landscape of Tiger Mountain, blending old-school cross-country with modern downhill elements.

Planning your ride on this difficult 9.1-mile (14.7 km) loop, which includes 1670 feet (509 metres) of elevation gain and takes about 1 hour and 43 minutes, requires some foresight. The trails are generally open year-round, but logging roads on Tiger Mountain Road can close for timber harvest, so always check local conditions. This route is best for intermediate to advanced riders who are comfortable with technical features and significant climbing.

This loop combines some of the most iconic mountain biking trails in the region. The Northwest Timber Loop, one of the original trails, offers a more mellow experience with bridge crossings, while Joyride was one of the first trails specifically built for mountain bikes in the area, known for its engaging mix of flow and tech. Off-The-Grid adds a black diamond challenge, making this a comprehensive tour of Tiger Mountain's best.

Hard
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If you're looking for a diverse and challenging mountain biking experience in Washington, the Northwest Timber, Legend, Joyride, East Tiger, and Master Link Loop delivers. This difficult 9.7-mile (15.7 km) route winds through towering evergreen forests, offering a mix of smooth singletrack, rooty sections, and flowy descents. You'll climb through lush greenery on Master Link and enjoy fast sections on East Tiger Summit, where clear days can reveal stunning views of Mount Rainier.

Plan for a substantial ride, as this loop involves 1697 feet (517 metres) of elevation gain and typically takes around 1 hour and 46 minutes to complete. The trailhead is easily accessible from the parking lot, but it's wise to arrive early on weekends to secure a spot. Always check current trail conditions, especially after rain, as some sections can become quite technical.

This loop is a local favorite, combining several iconic trails like Joyride, known for its fun mix of flow and technical features, and The Legend, which caters to advanced riders with its technical downhill sections. It's a fantastic way to experience the varied terrain and natural beauty of Tiger Mountain, making it a must-do for intermediate to advanced mountain bikers.

Hard

5.0

(6)

73

riders

24.0km

02:26

560m

560m

The Grand Ridge Trail offers a fantastic cross-country mountain biking experience through over 1,200 acres of deep, green forest in Issaquah, Washington. You'll navigate diverse terrain, from impressive stands of second-growth Douglas firs to distinctive groves of western red cedar, and even cross a 600-foot boardwalk. This moderate 14.9-mile (24.0 km) route, with 1852 feet (565 metres) of elevation gain, provides a dynamic ride that takes about 2 hours and 26 minutes to complete.

This trail is known for its year-round rideability, handling rain well and remaining accessible even in winter due to its low elevation. There are multiple access points, including from SE Grand Ridge Drive and Duthie Hill Mountain Bike Park, with ample parking available. Remember that it's a multi-use trail, so you'll be sharing the path with hikers and horseback riders.

A major highlight of the Grand Ridge Trail is its excellent connectivity to Duthie Hill Mountain Bike Park, allowing for longer, more challenging rides. You can easily link up with Duthie Hill's renowned skills park, creating extensive loops that offer a significant workout. It's a great option for riders looking to advance their skills beyond easier trails, providing sustained climbs and varied landscapes.

Moderate

Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.

Hard

5.0

(63)

28

riders

The Soaring Eagle Outer Loop offers a dynamic mountain biking experience through mature forests and wetlands near Sammamish. You'll navigate a mix of rooty, rocky technical sections and flowing paths, with constant ups and downs that keep the ride engaging. Keep an eye out for wildlife as you traverse the varied terrain, making for a pleasant natural escape.

This 5.2-mile (8.4 km) easy mountain biking route features 303 feet (92 metres) of elevation gain and typically takes around 45 minutes to complete. It's accessible year-round, though be aware that the trail can get quite muddy and puddle-filled during the wet season. Maps at major intersections make navigation simple, ensuring you can focus on the ride.

Part of the larger 790-acre Soaring Eagle Park, this loop is a popular spot for mountain biking, trail running, and hiking. The park has a rich history as a local mountain biking destination, and while some areas have seen development, it remains a fantastic place to improve your singletrack skills or simply enjoy a quick, invigorating ride.

Easy

16

riders

32.8km

03:54

1,210m

1,210m

The Olallie Trail is a challenging and immersive journey through towering, shaded forests, punctuated by breathtaking glimpses of the Cascade Range's snow-capped peaks.

Hard

1

riders

Hard mountain bike ride. Great for any fitness level. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

Hard

The East Tiger Summit Trail – Off The Grid Trail loop is a demanding mountain biking adventure that plunges you into the lush, towering evergreen forests of Tiger Mountain. You'll experience a mix of fast, flowy singletrack on the East Tiger Summit Trail, culminating in potential views of Mount Rainier from the 3,004-foot summit, before tackling the obstacle-laden, Black Diamond rated "Off The Grid" trail with its roots, rocks, and drops. This route is a true test of skill and endurance, offering a dynamic ride through shaded green landscapes and alongside picturesque creeks.

Planning your ride on this difficult 10.7-mile (17.3 km) loop, which includes 2397 feet (731 metres) of elevation gain and takes about 2 hours and 12 minutes, means preparing for a popular destination. The Tiger Mountain Trailhead can get busy, so aim for an early start to secure parking and enjoy the trails before the crowds. While the forest provides ample shade, always carry sufficient water, especially given the physical demands of this advanced ride.

This loop is a highlight within Tiger Mountain's extensive trail network, recognized as one of Seattle's premier mountain biking spots. "Off The Grid" is particularly celebrated by local riders for its challenging technical features combined with an engaging flow, making it a favorite for those seeking an advanced downhill experience. The area also holds remnants of historical logging operations, adding a layer of character to the natural beauty of the landscape.

Hard

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

Moderate
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Tips from the Community

mtm05005
June 26, 2025, Start of Upward Mobility Trail

This is the intersection of the Upward Mobility Trail and Rattlesnake Mountain Trail. The Upward Mobility Trail is popular with mountain bikers, so make sure you keep an eye out for other trail users as you pass by.

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Tiger Mountain State Forest in Mirrormont, Washington, beckons mountain bikers with diverse trails catering to all skill levels. From smooth singletracks to technical descents, thrill-seekers will find excitement. Highlights include Predator and Off the Grid for adrenaline rushes, and challenges await on trails like Fully Rigid and Joyride. There is parking and restrooms at the trailhead here.

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From it's summit you are rewarded with breathtaking views. Whether you choose to savor a picnic lunch or simply take a moment to soak in the beauty of nature, the picnic table provides a serene and comfortable setting to enhance your experience.

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LadyDi
March 14, 2022, Grand Ridge Trail

Grand Ridge Route is a fantastic (out-and-back) ride that connects Issaquah with Duthie Hill Park. Beginners will love it!

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This is where the Rattlesnake Mountain Trail (attention: hikers only) and the Upward Mobility Trail (for cyclists) begins. On Upward Mobility you gain over 1,000 feet in only 2.8 miles. Continue with Raging Ridge Trail if you are up for an technical 20 mile ride (aka Raging River Loop) or take Flow State Trail for a short and easy workout. No matter what you choose: You will have a blast!

1

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LadyDi
March 14, 2022, Olallie Trail

Great Out-and-Back trail with stunning views. Also perfect for beginners as you can turn around whenever you like.

1

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LadyDi
March 6, 2022, South Trail

A popular beginner trail at Soaring Eagle Park: No major climbs, no obstacles, simply pure fun!

1

0

LadyDi
March 6, 2022, Bear Way Trail

One of the more difficult trails at Soaring Eagle Park with big roots and some drops. Beginners can use the ride around options that are available at all features.

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Frequently Asked Questions

How many mountain bike trails are available in King County?

King County offers a vast network of mountain bike trails, with over 120 routes documented on komoot. These trails span diverse terrain, from the challenging Issaquah Alps to rolling lowlands, providing options for all skill levels.

Are there mountain bike trails suitable for beginners in King County?

Yes, King County has a good selection of trails for beginners. Approximately 30 easy routes are available. An example is the Soaring Eagle Outer Loop, which is 5.2 miles (8.4 km) long and leads through forested parkland.

Where can I find challenging mountain bike trails in King County?

For experienced riders seeking a challenge, King County offers around 30 difficult routes. Areas like Tiger Mountain and Raging River State Forest are known for their technical sections and vigorous climbs. Consider the Master Link and Predator Loop, a 5.9-mile difficult route in the Tiger Mountain area, or the Raging River Loop, which is over 19 miles long with significant elevation gain.

What are some popular mountain biking parks or areas in King County?

King County is home to several renowned mountain biking destinations. Duthie Hill Mountain Bike Park is world-renowned for its six-mile network of singletrack trails, jumps, and drop-offs. Other popular areas include Tiger Mountain State Forest and Raging River State Forest, both offering extensive trail systems. The King County Parks website provides more details on Duthie Hill.

Are there any mountain bike trails with scenic views in King County?

Many trails in King County offer beautiful views, particularly those in the Issaquah Alps region. Routes on Tiger Mountain often provide sweeping vistas of the Pacific Northwest landscape. On clear days, some trails around Lake Sawyer even offer views of Mount Rainier.

Can I find mountain bike trails that are loop routes in King County?

Yes, many mountain bike trails in King County are designed as loops, allowing for a continuous riding experience. For example, the Northwest Timber, Legend, Joyride, East Tiger, and Master Link Loop is a challenging 9.7-mile route on Tiger Mountain.

What kind of natural features can I expect to see along the trails?

King County's trails wind through diverse natural landscapes. You'll often ride through dense evergreen forests of Douglas fir and western hemlock. Many parks and natural areas also feature wetlands, riparian zones, small lakes, and ponds. The region is known for its lush, immersive riding environments.

Are there any waterfalls near the mountain biking trails in King County?

While not directly on mountain bike trails, King County is home to impressive waterfalls that can be visited nearby. The iconic Snoqualmie Falls is a notable natural monument. Other waterfalls in the region include Franklin Falls and Coal Creek Falls.

What do other mountain bikers enjoy most about King County trails?

The mountain biking experience in King County is highly rated by the komoot community, with an average score of 4.8 stars from over 230 reviews. Riders frequently praise the extensive and well-maintained trail networks, the variety of terrain suitable for all skill levels, and the beautiful, immersive evergreen forests that provide a unique Pacific Northwest riding environment.

Are there any long-distance mountain bike routes in King County?

Yes, King County offers several longer routes for those looking for extended rides. The Grand Ridge Trail is a moderate 14.9-mile (23.9 km) path that winds through pristine forest and connects to the Duthie Hill network. Another option is the Olallie Trail, a challenging 20.4-mile route.

What is the best time of year for mountain biking in King County?

King County's extensive backcountry trail networks are generally accessible year-round for mountain biking. However, the dense evergreen forests provide good cover, and the Pacific Northwest climate means trails can be wet, especially in winter. Always check local trail conditions before heading out, as some areas may have seasonal closures or muddy sections.

Are there mountain bike trails that connect to other parks or areas?

Yes, King County's trail system is well-connected. Duthie Hill Mountain Bike Park, for instance, connects to Grand Ridge Park and Soaring Eagle Park. The Black Diamond Open Space also offers connections to Henry's Ridge and Summit Ridge, allowing for longer, interconnected rides across different natural areas.

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Didn’t find what you were looking for?

Check out more MTB trails throughout King County below and find the perfect route in your destination.

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