The best traffic-free bike rides in California

The Alpine Dam & Mount Tamalpais East Peak loop from Downtown San Rafael is a challenging road cycling route that delivers some of the best scenery in Marin County. You'll pedal through dense redwood and oak forests, past the serene Alpine Lake and Alpine Dam, before tackling the famous "Seven Sisters" rollers. The reward for your effort is a breathtaking panoramic view from Mount Tamalpais East Peak, stretching from San Francisco to the Pacific Ocean.

This difficult 40.6-mile (65.4 km) ride, with its 4348 feet (1325 metres) of elevation gain, is a serious undertaking, typically taking around 3 hours and 40 minutes. The route is primarily on paved roads, though some sections can be steep and twisty, particularly on Fairfax-Bolinas Road. It's a demanding ride best suited for experienced cyclists with excellent fitness levels.

Widely considered a "crown jewel" among Marin County road cycling routes, this loop is often cited as one of the most scenic ways to experience Mount Tamalpais. The journey itself, with its varied microclimates and iconic landmarks like the Seven Sisters, is as much a highlight as the destination. It's a true bucket-list ride for those seeking an advanced road cycling experience near Downtown San Rafael.

The Santa Ana River Bicycle Path offers a unique road cycling experience, transitioning from serene natural river channels with mountain views to bustling urban centers and finally to the Pacific coast. You'll ride on a well-maintained, wide asphalt path, enjoying varied scenery that includes shaded sections, glimpses of the San Gabriel Mountains, and iconic landmarks like Angel Stadium before reaching the beautiful Huntington State Beach.

This moderate 46.9-mile (75.5 km) route, with a gentle 415 feet (126 metres) of elevation gain, typically takes around 3 hours and 33 minutes. It's highly accessible with many starting points, making it easy to plan a ride that suits your fitness level. While largely flat, expect moderate climbs if you're heading inland, especially on the return journey.

Known as a "bicycle freeway" for its grade-separated intersections, this trail is a significant multi-use facility in Southern California. It was designated a National Recreation Trail in 1977, highlighting its importance and the diverse environments it connects, from riverbanks to cityscapes and coastal views.

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.

Embark on the San Gabriel, Rio Hondo & Los Angeles River Loop for a moderate racebike adventure spanning 51.5 miles (82.8 km). You'll experience a diverse ride, cycling through urban areas, alongside concrete channels, and into unexpected green spaces. The route offers glimpses of parks and recreational areas, with opportunities for birdwatching, particularly near the Rio Hondo Spreading Grounds. As you pedal, you'll find segments shaded by eucalyptus trees and riparian vegetation. With a gentle elevation gain of 367 feet (112 metres), this loop typically takes about 4 hours and 14 minutes to complete. On clear days, the northern sections of the San Gabriel River Trail provide scenic views of the majestic San Gabriel Mountains in the distance.

Planning your ride is straightforward, as the trails are largely flat and well-maintained, making them suitable for most racebike riders. You will find numerous access points along all three river trails, which allows you to join or leave the loop at various locations, offering flexibility for shorter excursions. Many parks situated along the route provide convenient amenities such as restrooms, water fountains, and picnic areas, ensuring you have everything you need for a comfortable journey. Consider starting early to enjoy cooler temperatures and fewer crowds on this popular route.

This extensive loop offers a unique way to explore a significant portion of Los Angeles County on two wheels, connecting three major river systems. The route highlights the transformation of urban waterways into accessible recreational corridors, showcasing how green infrastructure integrates with city life. You will observe a blend of engineered landscapes and surprising pockets of natural habitat, providing a distinct perspective on the region's environment. It's a testament to urban planning that provides a continuous path for active transportation and outdoor enjoyment.