The best MTB trails in San Juan County
4.9
(27)
100
riders
15
rides
Mountain biking in San Juan County, Washington, offers diverse terrain across its islands, characterized by dense forests, scenic coastlines, and freshwater lakes. The region's landscape is shaped by glacial activity, creating varied elevation profiles from sea level to the summit of Mount Constitution. Mountain bike trails traverse these natural features, providing routes through woodlands, along lake shores, and to viewpoints overlooking the archipelago. This environment provides a mix of cross-country and downhill experiences suitable for different skill levels.
Best mountain bike trails in San Juan County
- The most popular mountain bike trail is Moran Lakes Tour – Moran State Park on Ocras Island, a 13.3 miles (21.4 km) trail that takes 2 hours 42 minutes to complete. This moderate route explores the forested areas and lakes within Moran State Park.
- Another top favourite among local mountain bikers is Cranberry Lake to Heart Lake loop, an easy 9.6 miles (15.5 km) path. This route connects two prominent lakes, offering a scenic ride through natural landscapes.
- Local mountain bikers also love the Jasper Way to Whistle Lake loop, a 12.8 miles (20.6 km) trail leading through forested areas and past Whistle Lake, often completed in about 2 hours 4 minutes.
- Mountain biking in San Juan County is defined by forested trails, coastal views, and island landscapes, with routes ranging from easy loops around lakes to more challenging climbs up hills like Mount Constitution. The network offers options for different ability levels, from beginner-friendly paths to moderate technical sections.
- The routes in San Juan County are highly rated by the komoot community with an average score of 4.9 stars from over 10 reviews. More than 100 mountain bikers have used komoot to explore San Juan County's varied terrain.
Last updated: April 26, 2026
15
riders
21.4km
02:42
680m
680m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(2)
9
riders
15.5km
01:30
280m
280m
This easy 9.6-mile mountain bike loop in Anacortes Community Forest Lands connects Cranberry Lake and Heart Lake, offering diverse terrain a
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20.6km
02:05
430m
430m
This moderate 12.8 mile mountain biking loop in the Anacortes Community Forest Lands offers challenging terrain and beautiful views of Whist
20
riders
25.2km
02:30
700m
700m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
11
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(4)
11
riders
12.7km
01:11
230m
230m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
5
riders
17.7km
01:47
620m
620m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.8
(8)
8
riders
20.5km
02:03
480m
480m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
6
riders
18.7km
02:01
520m
520m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
3
riders
48.6km
03:01
610m
610m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Tips from the Community
Roadside lake in the Anacortes Community Forest Lands. People fish, swim, hike and bike here. Maybe horsies too. May be tainted by toxic algae in the summer months - check before you swim or let your dog swim.
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Westside Scenic Preserve is a great place to admire the views across the Haro Strait. This preserve covers an area of ancient prairie and rocky coastline. It is also a good place for whale watching! There is a parking area which is open all the time, but there are no other facilities here.
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This bay's tragic name comes from the fact that remains of victims of the 1862 smallpox epidemic were burned here. Despite the name and challenging history, the views are sensational as soon as you come out of the trees, and you can walk right down to the beach.
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Head off of the road here to find Smallpox Bay. Smallpox Bay earned its name as it became a poignant site where victims of the 1862 Pacific Northwest smallpox epidemic, predominantly indigenous people, succumbed. U.S. officers, responsible for handling the aftermath, solemnly conducted the burning of the deceased victims' remains in this somber location. The views here are fantastic and worth a stop.
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Head off of the road here to find Smallpox Bay. Smallpox Bay earned its name as it became a poignant site where victims of the 1862 Pacific Northwest smallpox epidemic, predominantly indigenous people, succumbed. U.S. officers, responsible for handling the aftermath, solemnly conducted the burning of the deceased victims' remains in this somber location. The views here are fantastic and worth a stop.
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Cranberry Lake, a place of unrivaled beauty, beckons all who seek an easy, scenic trail with enticing swimming spots along the way. Cyclists find solace here, pedaling through the peaceful forest, relishing the lakeside views, and savoring the gentle to moderate challenges it offers.
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Twin Lakes is a pair of scenic lakes that each have a trail encircling them. The lake to the west is larger than the lake to the east.
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Dream Lake is a lake on the San Juan Islands that has a small island, known as Roy Island, within its waters.
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Frequently Asked Questions
What kind of terrain can I expect on mountain bike trails in San Juan County?
Mountain biking in San Juan County, Washington, offers diverse terrain shaped by glacial activity. You'll find trails winding through dense forests, along scenic coastlines, and past freshwater lakes. The elevation profiles vary from sea level to the summit of Mount Constitution, providing a mix of cross-country and downhill experiences.
How many mountain bike trails are available in San Juan County?
There are nearly 20 mountain bike trails listed in San Juan County. These include 4 easy routes and 13 moderate routes, catering to a range of skill levels.
Are there any easy mountain bike trails suitable for beginners in San Juan County?
Yes, San Juan County offers several easy mountain bike trails. A great option is the Cranberry Lake to Heart Lake loop, an easy 9.6-mile path that connects two prominent lakes, offering a scenic ride through natural landscapes.
What do other mountain bikers enjoy most about mountain biking in San Juan County?
The trails in San Juan County are highly rated by the komoot community, with an average score of 4.9 stars. Reviewers often praise the varied terrain, from forested paths to lake-side routes, and the overall scenic beauty of the island landscapes.
Are there any mountain bike trails that offer scenic viewpoints or landmarks?
Many trails offer stunning views, especially those around Moran State Park. For panoramic vistas, consider routes that ascend Mount Constitution, the highest point in the San Juan Islands. You can also find trails near beautiful lakes like Mountain Lake and Cascade Lake.
Are there any loop trails for mountain biking in San Juan County?
Yes, many mountain bike routes in San Juan County are loops. For example, the Jasper Way to Whistle Lake loop is a 12.8-mile trail through forested areas and past Whistle Lake. Another option is the Heart Lake – Heart Lake loop, which covers 11.1 miles.
What is the best time of year to go mountain biking in San Juan County?
The San Juan Islands offer pleasant conditions for mountain biking from spring through fall. Some trails, particularly those descending from Mount Constitution, may have seasonal closures for mountain biking, typically open mid-September to mid-May. Always check local conditions before you go.
Are there family-friendly mountain bike trails in San Juan County?
Yes, the islands provide diverse terrain, including quiet country roads and easier trails suitable for families. The Cranberry Lake to Heart Lake loop is an easy option that many families enjoy.
Where can I find parking for mountain bike trails in San Juan County?
Many trailheads, especially within Moran State Park and other designated biking areas like Mitchell Hill or Roche Harbor Highlands, offer parking facilities. For example, the Cascade Falls – Mountain Lake Loop Trail starts from a parking booth within Moran State Park.
Are there any longer mountain bike routes for experienced riders?
For experienced riders looking for a longer challenge, the Little Summit – Mount Constitution loop from Cascade Lake Dam is a moderate 17.8-mile route with significant elevation gain, offering a more demanding ride.
What are some notable natural features I might encounter while mountain biking?
You'll encounter dense forests, freshwater lakes such as Mountain Lake and Cascade Lake, and stunning coastal views. The landscape is characterized by its island charm and the prominent Mount Constitution.
Are there any historical sites accessible by mountain bike in San Juan County?
While primarily focused on natural beauty, some areas like San Juan Island offer trails near historical sites such as English Camp — San Juan Island National Historical Park. These can be explored as part of a longer ride or as a separate visit.
Most popular routes in San Juan County
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