| 7 Springs Loop | | Fremont Older | San Jose | CA | mtb |
| A4 Pond Loop Trail | | Don Edwards San Francisco Bay National Wildlife Refuge | Fremont | CA | hike |
| Abrigo Valley Trail | | Briones Regional Park | Walnut Creek | CA | mtb |
| Access Road | | Monte Bello Open Space | Palo Alto | CA | mtb |
| Acorn Trail | | Arastradero Preserve | Palo Alto | CA | mtb |
| Adobe Creek Trail | | Palo Alto | Palo Alto | CA | |
| Agua Caliente Trail | | Mission Peak | Fremont | CA | |
| Agua Caliente Trail | | Mission Peak | Fremont | CA | |
| Alameda Creek Trail | | Fremont | Fremont | CA | mtb |
| Alameda Creek Trail North | | Fremont | Fremont | CA | mtb |
| Alamitos Creek | | Almaden Quicksilver County Park | San Jose | CA | mtb |
| Alamo Creek Trail | | San Ramon | San Ramon | CA | |
| Alder Spring | | Monte Bello Open Space | Palo Alto | CA | mtb |
| Alexander Zuckermann Access | | César Chávez Park | Berkeley | CA | mtb |
| Alexander Zuckermann Memorial Trail | | César Chávez Park | Berkeley | CA | mtb |
| Alfred Zampa Memorial Bridge Pedestrian Path | | Crockett | Crockett | CA | |
| Alhambra Creek Trail | | Briones Regional Park | Walnut Creek | CA | mtb |
| Almaden Trail | | Calero County Park | San Jose | CA | mtb |
| Almond Trail | | Martinez | Martinez | CA | mtb |
| Almond Trail - Fire Road | | Martinez | Martinez | CA | mtb |
| Alpine Pond Trail | | Palo Alto | Palo Alto | CA | |
| Alpine Road | | Monte Bello Open Space | Palo Alto | CA | mtb |
| Alum Rock Service Road | | Alum Rock Park | San Jose | CA | mtb |
| Alvarado Park Trail | | Alvarado Park | Richmond | CA | mtb |
| Alviso Slough Trail | | Don Edwards San Francisco Bay National Wildlife Refuge | Fremont | CA | hike |
| Alviso Slough Trail North | | Don Edwards San Francisco Bay National Wildlife Refuge | Fremont | CA | hike |
| Amphitheater Trail | | Sugarloaf Mountain | San Mateo | CA | |
| Amphitheater Trail | | Morgan Territory Regional Preserve | Danville | CA | hike |
| Ancient Oak | | Monte Bello Open Space | Palo Alto | CA | mtb |
| Ancient Oak Connector | | Monte Bello Open Space | Palo Alto | CA | mtb |
| Anderson Landing Road | | Big Basin State Park | La Honda | CA | |
| Angel Kerley Road | | Diablo Foothills Regional Park | Walnut Creek | CA | mtb |
| Anza Esplanade | | The Presidio of San Francisco | San Francisco | CA | hike |
| Apay Way | | Coyote Hills Regional Park | Newark | CA | |
| Aqua Vista Trail | | Tilden and Wildcat Canyon | Berkeley | CA | mtb |
| Aquarius Road | | Joseph D. Grant County Park | San Jose | CA | |
| Aquila Loop | | Alum Rock Park | San Jose | CA | mtb |
| Aquinas Trail | | St. Joseph's Hill Open Space Preserve | Los Gatos | CA | |
| Arastradero Creek Trail | | Arastradero Preserve | Palo Alto | CA | mtb |
| Arguello Parking Lot to Road | | Arguello Park | San Carlos | CA | mtb |
| Arguello Trail | | Arguello Park | San Carlos | CA | mtb |
| Arguello Trail to Vista Point | | Arguello Park | San Carlos | CA | mtb |
| Arguello Traverse | | Arguello Park | San Carlos | CA | |
| Around It All | | Paso Nogal Park | Pleasant Hill | CA | mtb |
| Around the outside | | Hidden Lakes Park | Pleasant Hill | CA | mtb |
| Arroyo del Valle Regional Trail | | Sycamore Grove Park | Livermore | CA | mtb |
| Arroyo Trail | | Pedro Mountain | Montara | CA | hike |
| Arroyo Trail | | Tilden and Wildcat Canyon | Berkeley | CA | hike |
| Arroyo Valle | | Shadow Cliffs | Pleasanton | CA | |
| Artemisia | | Leona Canyon Regional Open Space Preserve | Oakland | CA | mtb |
| Audobon Frontage | | California | Portola Valley | CA | |
| Baccardo | | Alum Rock Park | San Jose | CA | mtb |
| Baccharis | | Redwood Regional Park | Oakland | CA | mtb |
| Back 9 | | Lime Ridge | Concord | CA | mtb |
| Back 9 | | Pleasanton Ridge | Pleasanton | CA | mtb |
| Back Ranch Loop | | Crockett Hills Regional Park | Crockett | CA | mtb |
| BackSide | | California | Pleasanton | CA | |
| Baquiano Trail | | Pacifica | Pacifica | CA | mtb |
| Barn Trail | | San Jose | San Jose | CA | mtb |
| Bass Cove | | Anthony Chabot Regional Park | Castro Valley | CA | mtb |
| Bass Lake Trail | | Joseph D. Grant County Park | Dinuba | CA | mtb |
| Bathroom | | Diablo Foothills Regional Park | Walnut Creek | CA | mtb |
| Bathroom Connector | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Batteries to Bluffs Trail | | The Presidio of San Francisco | San Francisco | CA | hike |
| Battery East Road | | Sausalito | Sausalito | CA | mtb |
| Bay Area Ridge Trail | | Saratoga Gap Open Space Preserve | Saratoga | CA | mtb |
| Bay Area Ridge Trail | | Mission Peak | Fremont | CA | mtb |
| Bay Area Ridge Trail | | The Presidio of San Francisco | San Francisco | CA | hike |
| Bay Area Ridge Trail | | Mission Peak | Fremont | CA | |
| Bay Area Ridge Trail (Glen Cove) | | Vallejo | Vallejo | CA | mtb |
| Bay Laurel Trail | | Arastradero Preserve | Palo Alto | CA | mtb |
| Bay Leaf (Double Track) | | Pleasanton Ridge | Pleasanton | CA | mtb |
| Bay Leaf Trail | | Pleasanton Ridge | Pleasanton | CA | mtb |
| Bay Trail | | Don Edwards San Francisco Bay National Wildlife Refuge | Fremont | CA | hike |
| Bay Trail | | The Presidio of San Francisco | San Francisco | CA | hike |
| Bay View Trail | | Fremont Older Open Space Preserve | Saratoga | CA | mtb |
| Baylands Bike Path | | Don Edwards San Francisco Bay National Wildlife Refuge | Fremont | CA | mtb |
| Bayview | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Bayview Trail | | Coyote Hills Regional Park | Newark | CA | mtb |
| BBQ Terrace Road | | Diablo Foothills Regional Park | Walnut Creek | CA | mtb |
| Bear Mountain | | Henry W. Coe State Park | Morgan Hill | CA | mtb |
| Belgum Trail | | Tilden and Wildcat Canyon | Berkeley | CA | |
| Bella Vista | | Monte Bello Open Space | Palo Alto | CA | mtb |
| Belmont Canyon Road | | Waterdog Lake Park | Belmont | CA | |
| Belmont Edge Trail | | Belmont | Belmont | CA | |
| Bench Trail Through Desert Downhill | | Briones Regional Park | Walnut Creek | CA | hike |
| Benicia Bay Trail | | Benicia State Recreation Area | Benicia | CA | |
| Benicia Territory DH | | Benicia | Benicia | CA | mtb |
| Bernal Hill | | Santa Teresa County Park | San Jose | CA | |
| Bernal Trail | | San Francisco Bay Area | San Jose | CA | mtb |
| Bernice Rodgers Way trail | | Golden Gate Park | San Francisco | CA | mtb |
| Berry Trail | | Waterdog Lake Park | Belmont | CA | mtb |
| Beyond Nimitz | | Tilden and Wildcat Canyon | Berkeley | CA | |
| Big Bear | | Alum Rock Park | San Jose | CA | |
| Big Bear Connector | | Redwood Regional Park | Oakland | CA | hike |
| Big Bear Trail | | Redwood Regional Park | Oakland | CA | hike |
| Big Oak Trail | | Las Trampas Regional Park | Alamo | CA | |
| Big Trees (Climbing Path) | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Big Trees (inner) | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Big Trees (outer) | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Big Valley Trail | | Crockett Hills Regional Park | Crockett | CA | mtb |
| Bill Kiefer Trail | | Las Trampas Regional Park | Alamo | CA | mtb |
| Birthday | | Las Trampas Regional Park | Alamo | CA | hike |
| Bishop Road Cutoff | | El Granada | El Granada | CA | mtb |
| Bishop's Walk | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Black Diamond to Mount Diablo Regional | | Lime Ridge | Concord | CA | mtb |
| Black Hawk Creek Road | | Mount Diablo State Park | Danville | CA | |
| Black Hawk Ridge Road | | Mount Diablo State Park | Danville | CA | |
| Black Hawk Shoot | | Mount Diablo State Park | Danville | CA | |
| Black Hills Trail | | Morgan Territory Regional Preserve | Danville | CA | |
| Black Mountain Camp Road | | Palo Alto | Palo Alto | CA | mtb |
| Black Mountain Trail | | Monte Bello Open Space | Palo Alto | CA | hike |
| Black Oak Loop Trail | | Kennedy Grove Regional Recreation Area | Richmond | CA | mtb |
| Black Oak Trail | | Briones Regional Park | Walnut Creek | CA | mtb |
| Black Phoebe Trail | | Fernandez Ranch | Martinez | CA | mtb |
| Blue Blossom | | El Corte de Madera Creek Open Space Preserve | Redwood City | CA | mtb |
| Blue Oak | | Lime Ridge | Concord | CA | mtb |
| Blue Oak Knoll | | Pleasanton Ridge | Pleasanton | CA | |
| Blue Oak Knoll | | Pleasanton Ridge | Pleasanton | CA | mtb |
| Blue Oak Trail | | Morgan Territory Regional Preserve | Danville | CA | |
| Blue Ridge Road | | Santa Teresa County Park | San Jose | CA | |
| Blue Rock Golf Course Connector | | Vallejo | Vallejo | CA | mtb |
| Blue Rock Springs Cycleway | | Vallejo | Vallejo | CA | |
| Blue Rock Springs Trail | | Vallejo | Vallejo | CA | hike |
| Blue Rock Springs West | | Vallejo | Vallejo | CA | mtb |
| Blue Rocks Trail | | Santa Teresa County Park | San Jose | CA | |
| Bo Gimbal | | Monte Bello Open Space | Palo Alto | CA | mtb |
| Boccardo Loop | | Alum Rock Park | San Jose | CA | mtb |
| Bollinger Canyon Trail | | Las Trampas Regional Park | Alamo | CA | |
| Bollinger Creek Loop | | Las Trampas Regional Park | Alamo | CA | mtb |
| Bollinger Creek Loop | | Las Trampas Regional Park | Alamo | CA | mtb |
| Bonhoff Trail | | Joseph D. Grant County Park | San Jose | CA | mtb |
| Bonitas Connector | | Alvarado Park | Richmond | CA | mtb |
| Bonitas Gate Trail | | Tilden and Wildcat Canyon | Berkeley | CA | |
| Bonus Hill | | Arastradero Preserve | Palo Alto | CA | mtb |
| Booze Lake Access | | Henry W. Coe State Park | Morgan Hill | CA | |
| Booze Lake Road | | Henry W. Coe State Park | Morgan Hill | CA | |
| Borden Hatch Mill Trail | | Purisima Creek Redwoods Open Space Preserve | Woodside | CA | mtb |
| Borges Ranch | | Shell Ridge Open Space | Walnut Creek | CA | mtb |
| Bottom Clencher | | Sugarloaf Mountain | San Mateo | CA | |
| Bottom Clencher Alternate | | Sugarloaf Mountain | San Mateo | CA | |
| Bottom Spring Trail | | Walnut Creek | Walnut Creek | CA | mtb |
| Bottom Spring Trail East | | Walnut Creek | Walnut Creek | CA | mtb |
| Boundry Trail | | Santa Teresa County Park | San Jose | CA | |
| Bowl Loop | | Arastradero Preserve | Palo Alto | CA | mtb |
| Bowls Connector | | Arastradero Preserve | Palo Alto | CA | mtb |
| Box Canyon Fire Road | | Sugarloaf Mountain | San Mateo | CA | mtb |
| Boy Scout Trail | | Pedro Mountain | Montara | CA | mtb |
| Brandon | | Anthony Chabot Regional Park | Castro Valley | CA | mtb |
| Brass House | | Shell Ridge Open Space | Walnut Creek | CA | mtb |
| Brians Trail | | Las Trampas Regional Park | Alamo | CA | mtb |
| Bridgeview | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Briones Crest Trail | | Briones Regional Park | Walnut Creek | CA | |
| Briones Road | | Briones Regional Park | Walnut Creek | CA | mtb |
| Briones to Mt. Diablo | | Diablo Foothills Regional Park | Walnut Creek | CA | mtb |
| Brothers Bypass | | St. Joseph's Hill Open Space Preserve | Los Gatos | CA | mtb |
| Brothers Bypass (Upper) | | St. Joseph's Hill Open Space Preserve | Los Gatos | CA | mtb |
| Browning Monument Peak | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Bruce Lee Road | | Lime Ridge | Concord | CA | mtb |
| Brush Trail | | San Jose | San Jose | CA | |
| Brush Trail | | San Jose | San Jose | CA | mtb |
| Brush Trail Connector | | Joseph D. Grant County Park | San Jose | CA | |
| Brushy Peak Loop Trail | | Brushy Peak Regional Preserve | Livermore | CA | mtb |
| Buck Access | | Shell Ridge Open Space | Walnut Creek | CA | mtb |
| Buck Connector | | Shell Ridge Open Space | Walnut Creek | CA | mtb |
| Buckeye | | Diablo Foothills Regional Park | Walnut Creek | CA | mtb |
| Buckeye Ranch Trail | | Briones Regional Park | Walnut Creek | CA | mtb |
| Buckeye Trail | | Lime Ridge | Concord | CA | mtb |
| Bull Valley Trail | | Carquinez Strait Regional Shoreline | Benicia | CA | mtb |
| Bull Valley Trail | | Crockett | Crockett | CA | mtb |
| Burleigh Murray Ranch Trail | | Half Moon Bay | Half Moon Bay | CA | |
| Burma Road | | Diablo Foothills Regional Park | Walnut Creek | CA | mtb |
| Burton Valley | | Las Trampas Regional Park | Alamo | CA | |
| Bus Trail | | Half Moon Bay | Half Moon Bay | CA | |
| Butano Fire Road | | Big Basin State Park | La Honda | CA | |
| Butano View Trail | | Palo Alto | Palo Alto | CA | |
| CA Coastal Trail (Dardanelle Trail) | | Half Moon Bay | Half Moon Bay | CA | |
| CA Coastal Trail (Harbor to Poplar) | | Half Moon Bay | Half Moon Bay | CA | |
| CA Coastal Trail (Redondo to Ritz) | | Half Moon Bay | Half Moon Bay | CA | |
| Calaveras Ridge Regional Trail | | Five Canyons Open Space | Castro Valley | CA | |
| Calero Creek | | Santa Teresa County Park | San Jose | CA | mtb |
| California Coastal Trail | | The Presidio of San Francisco | San Francisco | CA | hike |
| Cameron Loop | | Anthony Chabot Regional Park | Castro Valley | CA | mtb |
| Campolindo Trail | | Las Trampas Regional Park | Alamo | CA | |
| Cana Road | | Dry Creek Pioneer Regional Park | Hayward | CA | mtb |
| Canada De Pala Trail | | San Francisco Bay Area | San Jose | CA | mtb |
| Canal Track | | Calero County Park | San Jose | CA | |
| Canyon | | Redwood Regional Park | Oakland | CA | mtb |
| Canyon Connector | | Redwood Regional Park | Oakland | CA | mtb |
| Canyon Creek Trail | | Waterdog Lake Park | Belmont | CA | mtb |
| Canyon Loop Trail | | Fernandez Ranch | Martinez | CA | mtb |
| Canyon Trail | | Las Trampas Regional Park | Alamo | CA | |
| Capehorn Pass | | Almaden Quicksilver County Park | San Jose | CA | mtb |
| Captain Hook | | Sugarloaf Mountain | San Mateo | CA | mtb |
| Carlmont main Trail | | Carlmont Hills | Belmont | CA | mtb |
| Carlmont Switch Backs | | Carlmont Hills | Belmont | CA | mtb |
| Carquinez Overlook Trail | | Carquinez Strait Regional Shoreline | | CA | mtb |
| Carrol Ranch Ridge Trail | | Las Trampas Regional Park | Alamo | CA | |
| Castle Park (DH) | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |
| Castle Park (XC) | | Joaquin Miller Park (JMP) | Oakland | CA | mtb |