The spirit of exploration thrives in the East Bay’s trails. These trails are an invitation to experience a seamless transition from bustling city blocks to wide-open ridges and serenity. They are versatile, and every adventure reveals a different facet of the region’s evolving landscape.
Whether you are looking for ancient history, a rugged workout, or a casual weekend stroll, these four distinct paths around Contra Costa County are absolutely worth a visit.
Shell Ridge
At the edge of Walnut Creek, Shell Ridge unfolds like a historical East Bay frontier, with windswept ridgelines, fossil-lined hills, and grasslands stretching toward Mount Diablo. It is a landscape shaped by history and well known for its spring wildflower blooms and golden California poppies, which attract hikers and photographers from across the Bay Area. Historically, ShellRidge was named for the marine fossils embedded in the hillsides, evidence that the region was once underwater millions of years ago. It is also home to historic sites like Howe Homestead Park and the Borges Ranch area, which reflect Contra Costa County's ranching history. The preserve is closely connected to Diablo Foothills Regional Park and trails leading toward Mount Diablo, making it a central hub for East Bay outdoor exploration.
Lime Ridge
Lime Ridge has been a long-time favorite for trail runners, mountain bikers, photographers, and hikers. Spanning between Walnut Creek and Concord, the landscape unfolds in a series of winding fire roads, rugged single-track trails, hidden valleys, and sweeping overlooks. Millions of years ago, this region lay beneath an ancient inland sea, leaving behind limestone deposits that later shaped the preserve's identity. Lime Ridge takes its name from the limestone quarrying operations that occupied portions of the hills throughout the early twentieth century, remnants of which can still be found along certain trails.
Iron Horse Regional Trail
Stretching through the heart of Contra Costa County, the Iron Horse Regional Trail offers an exploration defined by the region’s suburban landscape, sycamores and oak trees, with open stretches of rolling hills. The trail’s gentle terrain makes it ideal for long walks, casual bike rides, and jogging. Iron Horse Trail also serves as a recreational landmark, as it was originally built along the former Southern Pacific Railroad route. The trail was transformed into a versatile greenway that now supports walking, running, cycling, skating, and commuting throughout Contra Costa and Alameda counties.
Acalanes Ridge
For those seeking a smaller and scenic experience, Acalanes Ridge Open Space offers one of Walnut Creek’s most rewarding experiences. Located on the northwestern edge of the city above the Interstate 680 and Highway 24 interchange, this compact greenbelt forms a natural boundary between Walnut Creek and Lafayette. It is a network of short trails, making it ideal for quick hikes and walks, offering scenic views.