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18
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5
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Gravel bike trails in San Diego Bay National Wildlife Refuge traverse diverse landscapes, including coastal salt marshes, intertidal mudflats, and rolling hills. The region encompasses approximately 2,620 acres of land and water, preserving critical wetland habitats. Riders can experience scenic views of the Silver Strand and, in some areas, packed gravel surfaces. These routes offer opportunities to observe a wide array of wildlife within an urbanized coastal environment.
Last updated: October 8, 2026
6
riders
71.3km
04:38
1,250m
1,250m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
1
riders
41.4km
02:33
370m
370m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

2
riders
61.0km
03:52
550m
550m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
2
riders
47.9km
03:18
590m
590m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
1
riders
94.9km
07:21
660m
660m
Embark on the Bayshore and Sweetwater Bikeway Loop, a challenging gravel biking route that showcases the diverse landscapes of San Diego. This 59.0-mile (94.9 km) journey takes you from the bustling urban views of San Diego Bay and Coronado, past landmarks like the historic Hotel del Coronado, to the tranquil, natural settings of the Sweetwater River. You'll experience a mix of paved paths and sections of dirt and crushed gravel, particularly as you wind through Sweetwater Regional Park, offering a dynamic and engaging ride for experienced cyclists.
Planning your ride on this difficult route, which typically takes around 7 hours and 20 minutes to complete with 2170 feet (661 metres) of elevation gain, is essential. While specific trailhead parking isn't detailed, consider starting early to ensure a good spot. The option to incorporate a ferry crossing from Coronado back to San Diego adds a fun logistical twist. Always pack ample water and snacks, and check the weather, as the varied terrain and length require preparation.
This loop is a fantastic way to explore the region's blend of urban and natural beauty, connecting the iconic Bayshore Bikeway with the Sweetwater River Trail gravel biking experience. You'll encounter the San Diego Bay National Wildlife Refuge, a crucial wetland for migratory birds, offering opportunities for wildlife spotting. The route is part of a larger network, including the California Coastal Trail, making it a significant and memorable ride in the San Diego area.
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
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Popular around San Diego Bay National Wildlife Refuge
Nice bike trail. Just watch out for the homeless camp
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This multi-use trail runs along the Sweetwater River between Chula Vista and the Sweetwater Reservoir. Keep and eye out for hikers, runners, and horses, as they all use this trail.
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Centennial Park is home to the Coronado Ferry Terminal. You can catch the ferry and ride it back to San Diego from here. There are also some grassy areas, a beach, and a bunch of restaurants and shops here.
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The view from this section of the bikeway is stunning. The vibrant green and blue colors of the water and skyline are breathtaking and worthy of a stop to take some incredible photos.
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If you plan it well, you can finish the ride with some beers and snacks from the Pio Pico camping grounds store.
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The San Diego Bay National Wildlife Refuge is a wildlife refuge that was created to protect San Diego's historic coastal salt marsh and mudflat habitat. The refuge is home to a wide variety of wildlife. There are several bike paths that run along the coast, which give you great views of the water and a chance to spot wildlife.
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The gravel bike trails in the San Diego Bay National Wildlife Refuge traverse diverse landscapes, including coastal salt marshes, intertidal mudflats, and rolling hills. You'll find sections with packed gravel surfaces, offering scenic views of the Silver Strand and opportunities to observe a wide array of wildlife within an urbanized coastal environment.
Yes, while some routes are more challenging, the region offers options suitable for various skill levels. The Otay Valley Regional Park – Sweetwater Bikeway loop from Palomar Street is a moderate 25.7-mile path that offers views of diverse coastal habitats and wetlands, which can be a good option for families looking for a less strenuous ride.
You can explore several interesting spots. The Bayshore Bikeway – Salt Flats Section passes directly through the refuge, offering views of coastal habitats. The Bernardo Shores Spur is another connector trail lined with palm trees, ideal for wildlife observation. Don't miss the Pond 10 Bird Mural, a unique artistic highlight.
The San Diego Bay National Wildlife Refuge is a great year-round destination due to its mild climate. However, for optimal wildlife viewing, especially birdwatching, consider visiting during migratory seasons. Always check local weather conditions before heading out, as coastal areas can experience varying conditions.
Absolutely. For experienced riders seeking a challenge, the Otay Mesa – Otay Mountain loop from Palomar Street is a difficult 44.4-mile trail featuring scenic rolling hills and significant elevation changes. Another demanding option is the Bayshore and Sweetwater Bikeway Loop, a 59.0-mile trail through coastal environments and wetlands.
Yes, several routes are designed as loops, allowing you to start and end at the same point. For example, the Sweetwater River – Sweetwater Bikeway loop from Park & Market offers a moderate 46.5-mile circular path, providing a comprehensive experience of the area's natural beauty.
The refuge is a haven for birdwatchers, providing crucial habitats for endangered, threatened, and migratory species. You can expect to see snowy egrets, ospreys, burrowing owls, and Ridgway's rails. The 'Salt Flats Section' of the Bayshore Bikeway and areas leading to bird blinds offer excellent opportunities for observation while cycling.
While specific parking details for all trailheads are not provided, the Swiss Park Staging Area is identified as a facility within the refuge, which may offer parking options. It's advisable to check the specific starting points of your chosen routes for parking availability.
The San Diego Bay National Wildlife Refuge is a protected area focused on wildlife conservation. While specific regulations for dogs on bike trails are not detailed in our data, it's generally recommended to check the official refuge guidelines regarding pets to ensure compliance and minimize disturbance to wildlife. You can find more information on the official website: fws.gov/refuge/san-diego-bay/visit-us.
Gravel biking here offers a unique blend of urban proximity and wild nature. You'll ride through critical wetland habitats, observe diverse wildlife, and enjoy scenic coastal views, all within an urbanized coastal environment. The refuge's commitment to preserving these ecosystems makes for a truly special and immersive outdoor experience.
While our guide data doesn't specify cafes directly on the trails, the San Diego Bay National Wildlife Refuge is situated within an urbanized coastal environment. This means you'll likely find various amenities, including cafes and restaurants, in the nearby towns and communities surrounding the refuge. Planning your route to pass through or near these areas can provide opportunities for refreshments.
There are at least 4 gravel biking routes detailed in the San Diego Bay National Wildlife Refuge, offering a range of difficulties from moderate to difficult. These routes provide diverse experiences across the refuge's unique landscapes.


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