4.8
(9)
986
riders
44
rides
Mountain biking around Marietta-Alderwood provides access to a diverse landscape characterized by significant natural features in Whatcom County, Washington. The area is situated near the Nooksack River and Bellingham Bay, offering a mix of waterfront and forested environments. Proximity to destinations like Galbraith Mountain, Larrabee State Park, and Lookout Mountain Open Space provides extensive trail networks. These areas feature varied terrain, including singletrack, challenging downhill sections, and routes through diverse forest types.
Last updated: May 17, 2026
42
riders
37.8km
03:09
630m
630m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
19
riders
33.3km
02:48
570m
570m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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5.0
(1)
17
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
26
riders
38.1km
02:54
620m
620m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
9
riders
39.9km
03:33
850m
850m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
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Run to the park and reward yourself with lunch at Keenan’s or a cup of coffee from Woods and enjoy the idea of the bay. Great park for the kids too!
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Lake Padden is a popular lake in Bellingham. There is a large park that surrounds the lake, that has a lot of picnic tables and grassy areas.
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Amazing trail. You can really pick up speed quick on this one. Defintely keep yourself controled. Took a super hard crash on this one once because I felt comfortable and just kept picking up speed before a root took me for a ride. Techy at the top with some amazing flow in the middle. Love the ending with the double drop.
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The nature preserve is an 85 acre park located in a dense forest. The park offers a short trail system where visitors can watch the local habitat. There is a parking lot, but no other facilities.
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Nestled along the Whatcom Creek Greenway, Derby Pond is a true angler's paradise. Spanning over 23 acres, it is home to abundant largemouth bass and other fish species, making it a popular destination for fishing enthusiasts. It serves as a vital trout-raising location, contributing to stocking numerous lakes, streams, and ponds in Washington state. Whether a quick stop or a leisurely break, this tranquil haven offers the perfect spot to have lunch during a long day of riding.
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As the name suggests, the Railroad Trail was constructed on the bed of an old railroad. It is made of crushed limestone and is a great traffic free alternative to Barkley Boulevard.
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This point provides four different opportunities to extend your ride, and it's a great chance to enjoy the mountain views through the pine trees.
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Lake Padden is located in a 745 acre park that offers nearly every amenity you can think of, including an award winning 18-hole golf course! The lake is surrounded by forest with mountains just off in the distance.
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There are over 40 mountain bike routes available for you to explore around Marietta-Alderwood. These trails offer a diverse range of experiences, from moderate cross-country rides to challenging downhill sections.
The Marietta-Alderwood area caters to a wide range of skill levels. You'll find 3 easy routes, 26 moderate routes, and 11 difficult routes, ensuring options for beginners looking for a gentle ride and experienced riders seeking a challenge.
While many trails in the broader Bellingham area, like those on Galbraith Mountain, offer diverse options, for family-friendly rides, consider exploring some of the easier routes available. The region's parks, such as Lake Padden Park, often have less technical trails suitable for a family outing.
Many of the popular mountain bike routes in the area are loops. For example, you can try the Railroad Trail – Derby Pond loop from Bellingham, which is a longer, more difficult option, or the Chuckanut Interurban Trail – Arroyo Nature Reserve loop from Bellingham Fairhaven for a moderate ride through varied forest.
The region offers several trails with stunning views. Galbraith Mountain provides spectacular vistas of Mount Baker, the Twin Sisters, and Bellingham Bay. You can also find scenic overlooks on routes like the Cyrus Gates Overlook – Double Down Trail loop from Bellingham Fairhaven, which features notable viewpoints like Raptor Ridge Lookout.
The mountain biking experience around Marietta-Alderwood is highly rated by the komoot community, with an average score of 4.96 stars. Riders often praise the extensive singletrack, diverse forest types, and the challenging downhill sections, as well as the coastal views found on many routes.
Yes, the trails often pass by or lead to interesting natural features. You might encounter Derby Pond, a beautiful lake, or ride through areas like Agate Bay Preserve. The Chuckanut Interurban Trail is also a notable attraction in itself, offering a scenic path.
The region generally offers good mountain biking conditions for much of the year. While specific trail conditions can vary, spring through fall typically provides the most favorable weather. Some trails, especially those on Galbraith Mountain, are well-maintained and can be ridden year-round, though winter conditions may bring rain and mud.
Absolutely. The area is known for its challenging routes. For advanced riders, consider trails like the Cyrus Gates Overlook – Double Down Trail loop from Bellingham Fairhaven, which features difficult downhill sections. Galbraith Mountain and Larrabee State Park also offer advanced trails like Ridge & Double Down.
Parking is generally available at access points for major trail systems. For instance, Galbraith Mountain has both north and south access points with designated parking. Larrabee State Park and Lake Padden Park also provide parking facilities for trail users. It's always a good idea to check specific trailheads for parking information before you go.
While Marietta-Alderwood itself is more rural, its close proximity to Bellingham means you're never far from amenities. Bellingham offers numerous cafes, restaurants, and bike shops. Some parks, like Boulevard Park, also have facilities nearby.
Given the varied terrain and potential for changing weather, it's best to dress in layers. Moisture-wicking clothing is recommended, along with appropriate protective gear such as a helmet, gloves, and knee pads. Depending on the season, waterproof or water-resistant outerwear can be beneficial, especially during the wetter months.


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