Antioch Dunes National Wildlife Refuge
Antioch Dunes National Wildlife Refuge
4.8
(3)
105
riders
2
rides
Road cycling in Antioch Dunes National Wildlife Refuge offers routes through a region characterized by its unique delta views and proximity to the San Joaquin River. The landscape includes regional shorelines, rolling hills, and reservoirs, providing varied terrain for cyclists. While the refuge itself has restricted access due to its conservation focus, the surrounding areas feature multi-use trails and scenic paths. This area presents opportunities for road cycling on paved surfaces, with some routes extending into adjacent regional parks.
Last updated: August 20, 2026
7
riders
18.6km
01:05
30m
30m
Moderate road ride. Great for any fitness level. Some segments of this route may be unpaved and difficult to ride.
4
riders
21.3km
00:55
120m
120m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

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6
riders
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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Popular around Antioch Dunes National Wildlife Refuge
The Big Break Regional Trail is a wonderful 3-mile paved path along the Delta shoreline. Itβs a perfect route for spending the day hiking, biking, and birdwatching. The trail connects to the Marsh Creek Regional Trail, making it a fantastic traffic-free route to access other destinations in the area including Brentwood, Oakley, and Antioch.
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The Marsh Creek Regional Trail stretches about 6 miles through Contra Costa County, California. It meanders along the name-giving Marsh Creek and offers scenic views of wetlands, grasslands, and wooded areas. The paved trail is popular for walking, running, and cycling.
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The excellent long distance trail is interrupted a few yards west from here by a road.
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Neighborhood park along Marsh Creek at the Junction of several trails, Well equipped with fitness devices and playground. Picnic shelters and water make it a good place for a break
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The Big Break Regional Shoreline is a scenic park located in Oakley. Covering over 1,600 acres, it offers a diverse natural environment with marshes, wetlands, and waterways. A great way to enjoy the area and spot various bird species is during a hike along the Big Break Trail.
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This multi-use pathway runs alongside Marsh Creek, passing through vast, bountiful farmlands. It is a paved trail stretching about 6.5 miles from Big Break, where the Delta shores meet the waves, to Creekside Park in Brentwood. Along the trail, you'll find many community parks and greenbelts, which are great for taking a break and escaping the summer heat.
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A nice neighborhood park is located next to Brentwood Creek, featuring a playground, picnic shelter, a basketball court, and walking trails.
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Excellent paved and partially packed dirt trail winding along Marsh Creek, here crossing the Trail that follows part of the Antioch - Brenteood rail right-of-way at a new bike bridge in Kestrel Park.
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There are 3 dedicated no-traffic road cycling routes in the Antioch Dunes area featured in this guide. These routes offer varying distances and difficulties, ensuring options for different skill levels.
No, direct recreational cycling within the Antioch Dunes National Wildlife Refuge is generally not permitted due to its primary focus on protecting endangered species and sensitive habitats. Public access is highly restricted, often limited to supervised tours. However, the surrounding region offers excellent no-traffic road cycling opportunities.
The no-traffic road cycling routes in the Antioch Dunes area generally feature relatively gentle terrain. For example, the easy-rated Marsh Creek Trail β Marsh Creek Regional Trail loop from Oakley has minimal elevation gain. Even moderate routes like the Marsh Creek Regional Trail β Los Vaqueros Reservoir loop from Antioch, while longer, still have manageable elevation changes, making them enjoyable for road cyclists seeking smoother rides.
Yes, there is an easy-rated route perfect for beginners: the Marsh Creek Trail β Marsh Creek Regional Trail loop from Oakley. This route covers approximately 26.7 km with very little elevation gain, providing a comfortable and enjoyable experience for those new to road cycling or looking for a relaxed ride.
Spring and fall generally offer the most pleasant conditions for road cycling in the Antioch Dunes area, with mild temperatures and less chance of extreme heat. Summers can be very warm, so early morning or late afternoon rides are advisable if cycling during those months. Winters are typically mild but can bring occasional rain.
Yes, routes like the Marsh Creek Trail β Marsh Creek Regional Trail loop from Oakley are excellent for families. These trails are paved, traffic-free, and have gentle gradients, making them safe and enjoyable for cyclists of all ages and skill levels. The Big Break Trail β Big Break Regional Shoreline loop from Oakley also offers a shorter, scenic option.
The routes in the Antioch Dunes area offer diverse scenic views, particularly along regional shorelines and near reservoirs. You can expect expansive Delta views, glimpses of waterways, and green spaces. Routes near Los Vaqueros Reservoir, for instance, provide picturesque water views, while others follow multi-use trails through natural landscapes.
Yes, all the no-traffic road cycling routes featured in this guide are designed as loops. This allows for convenient starting and ending points without the need for shuttle arrangements. Examples include the Marsh Creek Regional Trail β Los Vaqueros Reservoir loop from Antioch and the Big Break Trail β Big Break Regional Shoreline loop from Oakley.
Parking is generally available at trailheads or designated parking areas for regional parks and shorelines that host these no-traffic routes. For example, routes starting from Antioch or Oakley often have accessible parking near the beginning of the trails, such as those associated with the Marsh Creek Regional Trail or Big Break Regional Shoreline.
The area is highly rated by the komoot community, with an average score of 4.9 stars. Reviewers often praise the peaceful, traffic-free nature of the trails, the scenic views of the Delta and reservoirs, and the accessibility for various skill levels, from beginners to those seeking longer, moderate rides.
For those seeking a longer ride, the Marsh Creek Regional Trail β Los Vaqueros Reservoir loop from Antioch is a moderate-difficulty route spanning over 71 km. While not extremely challenging in terms of elevation, its length provides a good endurance test on a traffic-free path.


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