5.0
(3)
113
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32
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Hiking in Contra Loma Regional Park encompasses 780 acres centered around the 80-acre Contra Loma Reservoir. The terrain features rolling hills, expansive open spaces, and diverse habitats including grassland, California oak woodland, mixed evergreen forest, and chaparral. Hilly areas provide elevation changes, offering panoramic views of the surrounding mountains and Mount Diablo. The park's natural features include an 80-acre reservoir and varied landscapes.
Last updated: April 26, 2026
3
hikers
6.44km
01:54
190m
190m
Hike the easy 4.0-mile Old Homestead Loop Trail through rolling hills and historical mining areas in Black Diamond Mines Regional Preserve.
2
hikers
7.38km
02:02
120m
140m
Embark on the East and West Shore Loop Trail for a moderate hike that offers refreshing lake views and seasonal wildflowers. This 4.6-mile (7.4 km) route guides you around the prominent Contra Loma Reservoir, providing a pleasant experience as you walk its shores. You can expect to gain about 393 feet (120 metres) in elevation, making it a good workout without being overly strenuous. Most hikers complete the loop in approximately 2 hours and 2 minutes, leaving plenty of time to enjoy the natural surroundings.
Before you head out, confirm any potential entrance fees or current conditions by checking the Contra Loma Regional Park's official website. Parking is typically available right at the trailhead, which makes starting your hike quite convenient. While there are no specific warnings like snow or road closures usually noted for this trail, it is always wise to verify conditions before your visit. This trail is known to be both dog-friendly and family-friendly, welcoming a wide range of visitors.
The route is a popular choice for those seeking a balanced outdoor adventure within Contra Loma Regional Park. Its accessibility and scenic features, particularly around the reservoir, make it stand out in the area. You will find that the trail offers a consistent and enjoyable experience, perfect for a leisurely outing or a quick escape into nature.

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3
hikers
12.7km
03:51
440m
440m
Hike the moderate 7.9-mile Black Diamond Mines Ridge Trail Loop for panoramic views, varied terrain, and historical mining remnants.
1
hikers
9.42km
02:46
270m
260m
Hike the moderate Star Mine Trail for 5.9 miles (9.4 km) through historical mining landscapes and scenic views in Black Diamond Mines Region
1
hikers
9.44km
02:52
320m
280m
Hike the moderate 5.9-mile Stewartville, Corcoran Mine, and Ridge Loop for panoramic views and varied terrain in Black Diamond Mines Regiona
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Contra Loma Park forms a very large protected green space south of Contra Costa Canal and Antioch Community Park. It preserves some Trails named for the native American groups that once lived and thrived in this watershed, part of which might now be flooded by the Contra Loma Reservoir
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This barred tunnel was once a bustling entrance to the Star Mine, one of the most active coal mines in the area, providing a livelihood for many families. The rusted bars that now block the entrance are a stark reminder of the mine's past glory and the hard work that went into extracting coal from deep beneath the earth's surface.
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Contra Loma Reservoir is an 80-acre reservoir located in Contra Loma Regional Park that offers year-round fishing and summer swimming. Additionally, there are hiking and biking trails around the reservoir.
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This barred tunnel was once a bustling entrance to the Star Mine, one of the most active coal mines in the area, providing a livelihood for many families. The rusted bars that now block the entrance are a stark reminder of the mine's past glory and the hard work that went into extracting coal from deep beneath the earth's surface.
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This preserve is a treasure trove of history, home to the remnants of three mining towns, including former coal and sand mines. The park features include an underground visitor center, guided tours of a former sand mine, and 60 miles (97 km) of trails to explore that crisscross the rolling foothill terrain. The trails offer stunning views of the surrounding landscape, which is a mix of grassland, California oak woodland, California mixed evergreen forest, and chaparral, making it a nature lover's paradise.
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Contra Loma Reservoir is an 80-acre reservoir located in Contra Loma Regional Park that offers year-round fishing and summer swimming. Additionally, there are hiking and biking trails around the reservoir.
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Contra Loma Regional Park offers a diverse network of over 19 hiking trails. These routes cater to various skill levels, ranging from easy, accessible loops to more challenging ascents through the park's rolling hills.
Yes, the park is very family-friendly and offers several easy trails. The Contra Loma Reservoir loop is particularly suitable, being relatively flat with less than 100 feet of elevation gain over two miles, making it great for families and beginners.
Yes, Contra Loma Regional Park is generally dog-friendly. You can bring your pets along for a walk on designated trails, but please ensure they are kept on a leash and that you clean up after them to maintain the park's natural beauty for all visitors.
Yes, the park features several loop hikes. A prominent example is the Contra Loma Reservoir loop, which circles the 80-acre reservoir, offering continuous scenic views. Another option is the Oak Woodland Loop, which takes you through shaded woodlands and open grasslands.
Hikers in Contra Loma Regional Park can observe various wildlife, especially near the reservoir. Common sightings include fish, turtles, and a variety of shorebirds. The park's open spaces and rolling hills also provide habitats for other local fauna.
The park is enjoyable year-round, but spring and fall offer particularly pleasant hiking conditions with milder temperatures and vibrant natural colors. While much of the park is exposed, providing expansive views, some sections offer shade. During summer, consider early morning or late afternoon hikes, and in winter, be prepared for cooler, potentially wetter conditions.
The centerpiece of the park is the 80-acre Contra Loma Reservoir, which provides a scenic backdrop for many activities and trails. From various points in the park, you can enjoy expansive views of the surrounding mountains and, on clear days, even Mount Diablo. The contrast of colors from the mountains around the reservoir is particularly spectacular.
Yes, Contra Loma Regional Park offers parking facilities for visitors. There are numerous picnic areas, some reservable, scattered throughout the park, which often have adjacent parking. It's advisable to check the park's official website or map for specific parking lot locations.
While direct public transportation options to the park's trailheads might be limited, the park does offer access to the 15-mile Delta de Anza Trail, which connects to various points in the region. For specific public transport routes, it's best to consult local transit authority websites for the most up-to-date information on bus or train services to the Antioch area.
The komoot community highly rates the hiking experience in Contra Loma Regional Park, with an average score of 5.0 stars. Hikers often praise the diverse landscapes, the scenic views of the reservoir, and the variety of trails that cater to different fitness levels. The park's peaceful atmosphere and opportunities for wildlife observation are also frequently highlighted.
Yes, while the park is known for its accessible trails, it also offers more challenging options. The hilly terrain throughout the park provides a good workout for hikers seeking more strenuous routes. For example, the Rolling Hills Vista Trail is a moderate 4.5-mile path that ascends through the park's hills, providing panoramic views and a good challenge.
Beyond the trails, the park provides several facilities for visitors. There are numerous picnic areas, some with shade, ideal for post-hike relaxation. During the summer, a lifeguarded swimming lagoon with a sandy beach, changing rooms, and a refreshment stand offers a refreshing way to cool off. Restrooms are also available within the park.


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