The best road cycling routes in Contra Costa County

Mount Diablo via Summit Road offers a challenging and rewarding road cycling experience, taking you through diverse habitats to a peak with truly spectacular views. The route is primarily paved, but the terrain involves significant elevation changes and a twisty ascent, culminating in the panoramic vistas from Mount Diablo Summit. On a clear day, you can see for up to 200 miles, including distant sights like the Sierra Nevada and the Farallon Islands.

This is a difficult 30.1-mile (48.5 km) ride with 3745 feet (1141 metres) of elevation gain, typically completed in about 2 hours and 56 minutes. It's considered one of the most popular road cycling routes in the Bay Area, known for its strenuous climb with sections reaching 9% grade around Devil's Elbow and an even steeper final push to the summit. Water fountains and restrooms are available at various points along the way, including the Junction Ranger Station.

Mount Diablo is a highly regarded destination for advanced cyclists, even hosting a stage of the Tour of California. The road contour varies enough to keep the long ascent engaging, and the descent is fast and fun, though you should watch for gravel in the turns. The summit features an observation platform, a historic beacon tower, and a visitor center, providing a great reward for your effort.

The Lamorinda Trail Loop offers a fantastic road cycling experience, guiding you through the picturesque East Bay hills and charming communities of Lafayette, Moraga, and Orinda. Much of the route utilizes former railroad lines, providing a tranquil cycling environment, especially along the central section between Lafayette and Moraga. You'll enjoy expansive views and a blend of urban edges with natural scenery, including the notable Horseshoe Bend on the Lafayette-Moraga Bike Trail.

This moderate 26.8-mile (43.1 km) loop features 1147 feet (350 metres) of elevation gain and typically takes around 2 hours and 4 minutes to complete. Parking is readily available in Lafayette, Moraga, and Orinda, making access easy. While most of the path is safely separated from vehicle traffic, be aware that some road sections, such as Moraga Way, can have significant car traffic, and a few segments might be unpaved.

What makes this route stand out is its well-established network of trails that connect these communities, offering a dedicated and safer touring experience away from main roads. The historical context of tracing former railroad lines adds another layer of interest to this well-maintained and scenic ride, making it a popular choice for local cyclists.

The Lake Chabot Loop offers a diverse road cycling experience, transitioning from paved lakeshore paths with serene lake views to quiet, wooded interiors. You'll pedal through dense eucalyptus groves, open grassy meadows, and peaceful oak groves, with some sections providing beautiful bay views from higher points like Skyline Blvd. This route is a true test of endurance, combining varied scenery with challenging terrain.

Prepare for a difficult 43.3 miles (69.6 km) with a substantial 3477 feet (1060 metres) of elevation gain, typically taking around 3 hours and 44 minutes to complete. While some parts are flat, expect significant climbs and descents, with grades reaching up to 10% in places. A map is essential as the route can be poorly marked, and a parking or entrance fee may apply.

This loop is part of a larger network that connects to adjacent regional parks like Redwood Regional Park, offering options for even longer rides and more varied landscapes. It's a popular choice for cyclists seeking a challenging workout away from the busiest lakeshore areas, providing a different perspective on the East Bay's natural beauty.

The Carquinez Scenic Drive loop offers a dynamic road cycling experience, covering 30.4 miles (48.9 km) with a moderate difficulty rating and 2297 feet (700 metres) of elevation gain, typically taking around 2 hours and 31 minutes. You'll pedal through rolling coastal hills, enjoying expansive views of the Carquinez Strait and the Sacramento River Delta. The route winds past oak woodlands and open grasslands, with the active railroad line adding a unique visual element below.

For planning your visit, Martinez is a practical starting point with good parking availability. Riding the loop in a clockwise direction is often suggested to tackle climbs on quieter roads. While the George Miller Trail offers a car-free paved path, be aware that other segments of the Carquinez Scenic Drive can be narrow with limited bike lanes, especially when passing through the charming waterfront towns. Late winter and early spring are ideal for experiencing the hills at their greenest.

This route is highly regarded by Bay Area cycling clubs for its unique blend of natural beauty and historical interest. It connects you with the confluence of the San Francisco Bay and the Sacramento-San Joaquin River Delta, offering views of Benicia's waterfront and even distant Mt. Diablo. The opportunity to cycle through historic towns like Crockett and Port Costa, combined with the scenic George Miller Trail, makes this a memorable ride.

The Lamorinda Trail Loop offers a fantastic road cycling experience, winding through the scenic East Bay with a mix of dedicated paths and shared roads. You'll pedal past green hills, through the picturesque Moraga Valley, and along former railroad lines, enjoying a diverse landscape that blends urban edges with natural beauty. The route includes notable features like the unique Horseshoe Bend on the Lafayette-Moraga Bike Trail, providing a tranquil and engaging ride for its moderate 30.1-mile (48.5 km) distance.

When planning your ride, you'll find convenient parking in the communities of Lafayette, Moraga, and Orinda, making access easy. Maps are widely available, even at BART stations, to help you navigate this popular cycling route. To enjoy the best conditions and avoid heavier car traffic on some shared sections, it's a good idea to start your 2-hour and 27-minute journey early in the day, especially on weekends.

This moderate route is more than just a ride; it's a journey through local history, utilizing old railroad lines that once transported redwood lumber. The Lamorinda Trail Loop effectively connects the three East Bay communities, offering a continuous system with 2508 feet (764 metres) of elevation gain spread across three medium-sized hills. It's a great option for cyclists looking for a varied experience with both dedicated bikeways and shared road sections.

This challenging 49.7-mile (80.1 km) road cycling loop combines the varied landscapes of the Lamorinda Trail and the Carquinez Scenic Drive, offering a journey through East Bay hills, urban edges, and stunning waterfront vistas. You'll pedal through the green Moraga Valley, past San Pablo Reservoir, before reaching the dramatic Carquinez Strait with its expansive views of bridges and the Sacramento River Delta. Expect a difficult ride with 3320 feet (1012 metres) of elevation gain, taking approximately 3 hours and 59 minutes, best suited for experienced cyclists.

When planning your ride, be aware that some sections of the Carquinez Scenic Drive have narrow shoulders or share the road with cars, so strong road cycling skills are a must. Riding the Carquinez portion clockwise can make the climbs feel more manageable. Late winter and early spring offer the most vibrant green hills and pleasant conditions for this extensive loop. Remember to bring plenty of water and snacks for the duration.

This route uniquely stitches together two distinct East Bay cycling experiences: the more sheltered, repurposed railway corridors of the Lamorinda Trail and the exposed, scenic coastal roads of the Carquinez Scenic Drive. You'll pass through charming towns like Martinez, Crockett, and Port Costa, and experience the blend of natural beauty and historical interest that defines this part of California. It's a fantastic option for those seeking a long, diverse, and rewarding day in the saddle.

The Dougherty Valley loop offers a wonderfully smooth and scenic road cycling experience, perfect for a relaxed outing. You'll cruise along mostly well-paved paths, enjoying pleasant views of the San Ramon Valley and its rolling hills. The route integrates seamlessly with sections of the Iron Horse Trail, providing a wide and flat pathway, and on clear days, you might even spot Mt. Diablo in the distance. This easy 24.0-mile (38.6 km) ride with just 916 feet (279 metres) of elevation gain is designed for comfortable cycling, taking approximately 1 hour and 41 minutes.

Planning your visit to this accessible route is straightforward, with parking generally available in the surrounding San Ramon area. The gentle terrain and easy difficulty make it suitable for cyclists of all fitness levels, including beginners, and it can be enjoyed throughout much of the year. There are no complex permits or seasonal closures to worry about, allowing for spontaneous rides.

One of the unique features you'll encounter on the Dougherty Valley loop is the Golf Ball Protection Tunnel, a thoughtful addition ensuring cyclist safety near the San Ramon Country Club. This route stands out in the region for its commitment to an easy, enjoyable, and safe cycling experience, making it a fantastic option for families or anyone looking for a low-stress ride with natural vistas.

The Lamorinda and Briones Loop offers a challenging road cycling experience, blending the smooth, repurposed railway lines of the Lamorinda Trail with the demanding, hilly terrain of Briones Regional Park. You'll navigate a mix of paved roads and dedicated bikeways, encountering significant climbs and descents that lead to sweeping views of the East Bay hills, including Mount Diablo and Mount Tamalpais from higher points like Grizzly Peak Boulevard. The scenery transitions from urban fringes to open grasslands and oak woodlands, particularly lush and green from January to April.

This difficult 46.2-mile (74.4 km) route, with its 4463 feet (1360 metres) of elevation gain, typically takes around 3 hours and 57 minutes to complete. It's best suited for experienced cyclists seeking a substantial workout. Plan to carry ample water, especially on warmer days, and ensure your bike is ready for steep gradients. Parking is generally available in the communities near the start point, but arriving early on busy days is advisable.

What makes this route stand out is its unique combination of accessible urban trails and the rugged natural beauty of Briones Regional Park, offering a significant workout potential. The Lamorinda Trail system itself connects Lafayette, Moraga, and Orinda, providing a network of safer cycling options away from main roads for much of its length, before diving into the more demanding, scenic climbs of Briones.

The Iron Horse and Tassajara Loop offers a diverse road cycling experience, blending the smooth, flat stretches of the Iron Horse Regional Trail with the rolling hills and open spaces around Tassajara Creek Regional Park. You will cycle through a mix of residential areas, business parks, and natural greenbelts, enjoying views of the creek and surrounding landscapes. The route provides a pleasant blend of urban and natural scenery, making it a popular choice for East Bay cyclists.

This moderate 32.2-mile (51.8 km) ride involves about 960 feet (293 metres) of elevation gain and typically takes around 2 hours and 15 minutes. The Iron Horse Trail itself is very accessible, connecting to BART stations and offering ample parking in various towns like Danville, San Ramon, and Dublin. Since it is a multi-use path, be prepared to share the trail with pedestrians and maintain a mindful pace, especially in busier sections.

Historically, the Iron Horse Trail follows an old Southern Pacific Railroad right-of-way, abandoned in 1977, giving it a unique context as a regional connector. This route is ideal for those looking for popular cycling trails that offer a good workout without being overly strenuous, combining the ease of a rail trail with the gentle challenges of the Tassajara area's paved paths. It is a great way to explore the East Bay's varied terrain.