| 13 Oaks Fire Road | | Mount Burdell | Novato | CA | | |
| 680 | | Loma Alta Preserve | Fairfax | CA | | |
| 7 Eleven Trail | | China Camp | San Rafael | CA | hike | hike |
| A picnic slide | | Ragle Ranch Regional Park | Sebastopol | CA | | |
| Abbotts Lagoon Trail | | Point Reyes National Seashore | Point Reyes Station | CA | | |
| Access Trail | | Stafford Lake Bike Park | Novato | CA | mtb | mtb |
| Airforce Throughway | | Marin Municipal Water District | Fairfax | CA | | |
| Alamea | | Phillip Burton Wilderness | Olema | CA | | |
| Alamere Falls | | Phillip Burton Wilderness | Olema | CA | hike | hike |
| Alchemist Trail | | Tamarancho | Fairfax | CA | mtb | mtb |
| Alex Forman Trail (formerly Sky Oaks) | | Marin Municipal Water District | Fairfax | CA | hike | hike |
| Alice Eastwood Road | | Mount Tamalpais State Park | Mill Valley | CA | | |
| All the Oaks Trail | | Healdsburg Ridge Open Space Preserve | Healdsburg | CA | | |
| Alpine Trail | | Mount Tamalpais State Park | Mill Valley | CA | | |
| Alta Trail | | Marin Headlands | Sausalito | CA | | |
| Alta Vista | | Foothill Regional Park | Windsor | CA | mtb | mtb |
| Alto Bowl Fire Road | | Alto Bowl Preserve | Mill Valley | CA | | |
| Ancient Redwood | | Jack London State Historic Park | Santa Rosa | CA | mtb | mtb |
| Andiamo Trail | | Cloverdale | Cloverdale | CA | | |
| Angels Flight Trail | | Sonoma | Sonoma | CA | | |
| Apple Tree | | Jack London State Historic Park | Santa Rosa | CA | mtb | mtb |
| Apricot Tree | | Jack London State Historic Park | Santa Rosa | CA | mtb | mtb |
| Aquinas Road Connector | | Harry A Barbier Memorial Park | San Rafael | CA | | |
| Arroyo Trail | | Petaluma | Petaluma | CA | | |
| Arroyo Trailhead | | Helen Putnam Regional Park | Petaluma | CA | | |
| Arturo Trail | | Marin Municipal Water District | Fairfax | CA | | |
| Asbury Creek Trail | | Jack London State Historic Park | Santa Rosa | CA | | |
| Austin Creek Blvd | | Santa Rosa | Santa Rosa | CA | mtb | mtb |
| Azalea Hill | | Marin Municipal Water District | Fairfax | CA | | |
| Azalea Meadow Trail | | Marin Municipal Water District | Fairfax | CA | hike | hike |
| B-17 Extension | | Tamarancho | Fairfax | CA | mtb | mtb |
| B-17 Trail | | Tamarancho | Fairfax | CA | mtb | mtb |
| Baby Crack | | Marin Headlands | Sausalito | CA | hike | hike |
| Back Ranch Fire Trail | | China Camp | San Rafael | CA | | |
| Bad Finger | | Monte Rio Redwoods Regional Park and Open Space Preserve | Monte Rio | CA | | |
| Badger's Descent | | Sonoma Coast State Park | Occidental | CA | mtb | mtb |
| Bahia Ridge Fire Road | | Rush Creek | Novato | CA | | |
| Bald Hill Trail | | Marin Municipal Water District | Fairfax | CA | | |
| Bald Mountain Trail | | Sugarloaf Ridge State Park | Santa Rosa | CA | mtb | mtb |
| Baldy Trail | | Phillip Burton Wilderness | Olema | CA | | |
| Band-tailed Fire Road | | Mount Burdell | Novato | CA | | |
| Barbara Springs Trail | | Blithedale Summit Open Space Preserve | Larkspur | CA | | |
| Barnabe Fire Road | | Samuel P. Taylor State Park | Lagunitas - Forest Knolls | CA | | |
| Barnabe Mountain Fire Road | | French Ranch and Roy's Redwoods | Woodacre | CA | | |
| Batteries Loop Connector | | Marin Headlands | Sausalito | CA | | |
| Batteries Loop Trail | | Marin Headlands | Sausalito | CA | | |
| Battery Alexander Trail | | Marin Headlands | Sausalito | CA | | |
| Battery Spencer Lookout | | Marin Headlands | Sausalito | CA | hike | hike |
| Bay Area Ridge Trail | | Helen Putnam Regional Park | Petaluma | CA | | |
| Bay Hills Drive | | China Camp | San Rafael | CA | | |
| Bay Hills Fire Rd. | | China Camp | San Rafael | CA | | |
| Bay Trail | | Jack London State Historic Park | Santa Rosa | CA | mtb | mtb |
| Bay View Trail | | China Camp | San Rafael | CA | | |
| Bay Vista Trail | | Camino Alto Preserve | Mill Valley | CA | hike | hike |
| Bayview Trail | | Phillip Burton Wilderness | Olema | CA | | |
| Baywood Canyon Trail | | Loma Alta Preserve | Fairfax | CA | hike | hike |
| Beach Access | | Point Reyes National Seashore | Point Reyes Station | CA | hike | hike |
| Bear Valley Fire Rd | | Point Reyes National Seashore | Point Reyes Station | CA | | |
| Ben Johnson Trail | | Muir Woods National Monument | Mill Valley | CA | hike | hike |
| Benstein Trail | | Marin Municipal Water District | Fairfax | CA | hike | hike |
| Big baller | | Ragle Ranch Regional Park | Sebastopol | CA | | |
| Big Cat | | Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space | Lucas Valley - Marinwood | CA | hike | hike |
| Big Island Trail | | Monte Rio Redwoods Regional Park and Open Space Preserve | Monte Rio | CA | | |
| Big Leaf | | Shiloh Ranch Regional Park | Santa Rosa | CA | mtb | mtb |
| Big Leaf Access | | Shiloh Ranch Regional Park | Santa Rosa | CA | mtb | mtb |
| Big Rock Ridge Fire Road | | Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space | Lucas Valley - Marinwood | CA | | |
| Big Rock Trail | | Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space | Lucas Valley - Marinwood | CA | | |
| Big Step | | Cloverdale | Cloverdale | CA | hike | hike |
| Big Trees Trail | | Indian Tree Preserve | Novato | CA | | |
| Bike Path | | Sonoma | Sonoma | CA | | |
| Bill Williams Trail | | Marin Municipal Water District | Fairfax | CA | hike | hike |
| Bill Williams Trail Fire Road | | Marin Municipal Water District | Fairfax | CA | | |
| Bill's Trail | | Samuel P. Taylor State Park | Lagunitas - Forest Knolls | CA | | |
| Black Canyon Creek | | Sonoma Valley Regional Park | Glen Ellen | CA | mtb | mtb |
| Blackberry trail | | Ragle Ranch Regional Park | Sebastopol | CA | | |
| Blackstone Canyon | | Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space | Lucas Valley - Marinwood | CA | hike | hike |
| Blair Witch | | Monte Rio Redwoods Regional Park and Open Space Preserve | Monte Rio | CA | | |
| Blithedale Ridge Fire Road | | Blithedale Summit Open Space Preserve | Larkspur | CA | | |
| Blue Oak | | Rush Creek | Novato | CA | mtb | mtb |
| Blue Oaks Trail | | Healdsburg Ridge Open Space Preserve | Healdsburg | CA | | |
| Blue Ridge Fire Road | | White Hill Preserve | Fairfax | CA | mtb | mtb |
| Blue Ridge Fire Road | | Cascade Canyon Preserve | Fairfax | CA | | |
| Blue Ridge Fire Road (No Bikes) | | White Hill Preserve | Fairfax | CA | | |
| Bluff Trail | | Sea Ranch | Sea Ranch | CA | hike | hike |
| Bluff Trail | | Gualala | Gualala | CA | hike | hike |
| Bluff Trail | | Salt Point State Park | Fort Ross | CA | hike | hike |
| Boar Scat Loop | | Lake Sonoma | Geyserville | CA | | |
| Bob Middagh Trail | | Alto Bowl Preserve | Mill Valley | CA | | |
| Bobcat | | Windsor | Windsor | CA | mtb | mtb |
| Bobcat Trail | | Marin Headlands | Sausalito | CA | | |
| Bodega Head Trail | | Sonoma Coast State Park | Bodega Bay | CA | hike | hike |
| Bolema Trail | | Phillip Burton Wilderness | Olema | CA | | |
| Bolinas Ridge | | Golden Gate National Recreation Area | Stinson Beach | CA | | |
| Bolinas Ridge Trail | | Mount Tamalpais State Park | Mill Valley | CA | | |
| Bon Tempe Dam Rd | | Marin Municipal Water District | Fairfax | CA | | |
| Bon Tempe Rd. | | Marin Municipal Water District | Fairfax | CA | hike | hike |
| Bootjack Trail | | Mount Tamalpais State Park | Mill Valley | CA | hike | hike |
| Boulder Springs Trail | | Gary Giacomini Preserve | Woodacre | CA | | |
| Bowl Trail | | Cloverdale | Cloverdale | CA | mtb | mtb |
| Box Springs | | Monte Rio Redwoods Regional Park and Open Space Preserve | Monte Rio | CA | | |
| Box Springs / Sasquatch | | Sonoma Coast State Park | Occidental | CA | mtb | mtb |
| Broken Dam Trail | | Tamarancho | Fairfax | CA | mtb | mtb |
| Buckeye Trail | | Santa Rosa | Santa Rosa | CA | | |
| Bucklin | | Phillip Burton Wilderness | Olema | CA | | |
| Bullfrog Connector | | Marin Municipal Water District | Fairfax | CA | | |
| Bullpoint Trail | | Point Reyes National Seashore | Point Reyes Station | CA | | |
| Bummer Trail | | Lake Sonoma | Geyserville | CA | mtb | mtb |
| Bunker Road | | Marin Headlands | Sausalito | CA | | |
| Burdell Fire Road Shortcut | | Mount Burdell | Novato | CA | | |
| Burdell Mountain Fire Road | | Mount Burdell | Novato | CA | | |
| Burdell Trail | | Olompali State Historic Park | Novato | CA | hike | hike |
| Burn Fork Trail | | Taylor Mountain Regional Park | Santa Rosa | CA | | |
| Burnt Tree Fire Road | | Cascade Canyon Preserve | Fairfax | CA | | |
| Burnt Tree Trail | | Cascade Canyon Preserve | Fairfax | CA | | |
| Bypass Trail | | Sonoma Coast State Park | Occidental | CA | mtb | mtb |
| Caballo Rojo | | Tamarancho | Fairfax | CA | mtb | mtb |
| Camino Alto Fire Road | | Camino Alto Preserve | Mill Valley | CA | | |
| Camp Meeker Trail | | Camp Meeker | Camp Meeker | CA | hike | hike |
| Camp Road | | Monte Rio Redwoods Regional Park and Open Space Preserve | Monte Rio | CA | | |
| Camp Via | | Jack London State Historic Park | Santa Rosa | CA | mtb | mtb |
| Campo Gianni Loop Trail | | Monte Rio Redwoods Regional Park and Open Space Preserve | Monte Rio | CA | | |
| Canary | | Harry A Barbier Memorial Park | San Rafael | CA | | |
| Canary Connector | | Harry A Barbier Memorial Park | San Rafael | CA | mtb | mtb |
| Candelero Canyon (Madrone Arches) | | Gary Giacomini Preserve | Woodacre | CA | | |
| Canopy View Trail | | Muir Woods National Monument | Mill Valley | CA | | |
| Canyon | | Shiloh Ranch Regional Park | Santa Rosa | CA | mtb | mtb |
| Canyon Trail | | Kenwood | Kenwood | CA | hike | hike |
| Canyon Trail | | Marin Municipal Water District | Fairfax | CA | | |
| Canyon Trail | | Sugarloaf Ridge State Park | Santa Rosa | CA | hike | hike |
| Canyon Trail | | Annadel State Park | Santa Rosa | CA | mtb | mtb |
| Cardoza Road Trail | | Tolay Lake Regional Park | Petaluma | CA | hike | hike |
| Carey Camp Trail | | Cascade Canyon Preserve | Fairfax | CA | | |
| Carolyn Day Trail | | Jack London State Historic Park | Santa Rosa | CA | mtb | mtb |
| Carson Falls Trail | | Marin Municipal Water District | Fairfax | CA | | |
| Carved Out Bastard | | Shiloh Ranch Regional Park | Santa Rosa | CA | mtb | mtb |
| Cascade Falls Trail | | Cascade Canyon Preserve | Fairfax | CA | hike | hike |
| Cascade Fire Road (Repack) | | Marin Municipal Water District | Fairfax | CA | | |
| Cataract Trail | | Marin Municipal Water District | Fairfax | CA | hike | hike |
| Caterpillar | | Gary Giacomini Preserve | Woodacre | CA | hike | hike |
| Cattail Trail | | Helen Putnam Regional Park | Petaluma | CA | hike | hike |
| causeway-trail | | Tolay Lake Regional Park | Petaluma | CA | | |
| Cemetery Fire Road | | Terra Linda / Sleepy Hollow Preserve | San Rafael | CA | | |
| Central Trail | | Sonoma County | Timber Cove | CA | | |
| Central Trail | | Salt Point State Park | Fort Ross | CA | | |
| Channel Drive | | Annadel State Park | Santa Rosa | CA | mtb | mtb |
| Channel Trail | | Annadel State Park | Santa Rosa | CA | | |
| Chaparral Trail | | Marin Headlands | Sausalito | CA | | |
| Checker Lily | | Jack London State Historic Park | Santa Rosa | CA | mtb | mtb |
| Cheney Creek Trail | | Bodega Bay | Bodega Bay | CA | hike | hike |
| Cherry Hill Fire Road | | Terra Linda / Sleepy Hollow Preserve | San Rafael | CA | | |
| Chicken Shack Fire Road | | Lucas, Ignacio, Loma Verde, Pacheco and Marinwood Open Space | Lucas Valley - Marinwood | CA | | |
| Chimney Rock | | Point Reyes National Seashore | Point Reyes Station | CA | hike | hike |
| Cistern Trail | | Bald Hill | San Anselmo | CA | | |
| Citron Fire Road | | Baltimore Canyon and King Mountain Preserve | Larkspur | CA | | |
| Coast Glen Spur | | Phillip Burton Wilderness | Olema | CA | | |
| Coast Trail (Bike Legal Section) | | Point Reyes National Seashore | Point Reyes Station | CA | | |
| Coast Trail (Point Reyes) | | Phillip Burton Wilderness | Olema | CA | | |
| Coast View Trail | | Mount Tamalpais State Park | Mill Valley | CA | | |
| Coastal (Muir Beach - Coyote Ridge) | | Marin Headlands | Sausalito | CA | | |
| Coastal (Tennessee Valley - Muir Beach) | | Marin Headlands | Sausalito | CA | | |
| Coastal Trail | | Marin Headlands | Sausalito | CA | | |
| Coastal Trail | | Marin Headlands | Sausalito | CA | | |
| Coastal Trail | | Marin Headlands | Sausalito | CA | | |
| Coastal Trail | | Marin Headlands | Sausalito | CA | | |
| Coastal Trail (Conzelman/Bunker) | | Marin Headlands | Sausalito | CA | | |
| Coastal Trail (Rodeo Beach area) | | Marin Headlands | Sausalito | CA | | |
| Coastal Trail (to Hill 88) | | Marin Headlands | Sausalito | CA | | |
| Coastal Trail Tennessee Cove (Shortcut) | | Marin Headlands | Sausalito | CA | hike | hike |
| Cobblestone | | Annadel State Park | Santa Rosa | CA | mtb | mtb |
| Cobblestone Bypass | | Annadel State Park | Santa Rosa | CA | mtb | mtb |
| Cobblestone Fire Road | | Mount Burdell | Novato | CA | | |
| Coleman Hill Trail | | Bodega Bay | Bodega Bay | CA | hike | hike |
| Colgan Creek Park | | Sebastopol | Sebastopol | CA | hike | hike |
| Colgan Highlands Trail | | Taylor Mountain Regional Park | Santa Rosa | CA | | |
| Colier Spring Trail | | Marin Municipal Water District | Fairfax | CA | hike | hike |
| Concrete Pipe Road | | Marin Municipal Water District | Fairfax | CA | | |
| Concrete Pipe Trail | | Marin Municipal Water District | Fairfax | CA | | |
| Conifer Fire Road | | Gary Giacomini Preserve | Woodacre | CA | | |
| Conneccion | | Monte Rio Redwoods Regional Park and Open Space Preserve | Monte Rio | CA | | |
| Connector 6 | | Monte Rio Redwoods Regional Park and Open Space Preserve | Monte Rio | CA | | |
| Contour Trail | | Gary Giacomini Preserve | Woodacre | CA | | |
| Conzelman Road | | Marin Headlands | Sausalito | CA | | |
| Coon Trap | | Jack London State Historic Park | Santa Rosa | CA | mtb | mtb |
| Cooper Ridge Trail | | Taylor Mountain Regional Park | Santa Rosa | CA | | |
| Corte Madera Creek Path | | Kentfield | Kentfield | CA | mtb | mtb |
| Corte Madera Creek Trail | | Marin Municipal Water District | Fairfax | CA | hike | hike |
| Corte Madera Ridge Fire Road | | Blithedale Summit Open Space Preserve | Larkspur | CA | | |
| Cougar Trail | | Sonoma Valley Regional Park | Glen Ellen | CA | | |
| Cove | | Lake Sonoma | Geyserville | CA | | |
| Cow Track Ranch Road | | Nicasio | Nicasio | CA | | |
| Coyote Hill Overlook | | Healdsburg Ridge Open Space Preserve | Healdsburg | CA | | |
| Coyote Ridge | | Marin Headlands | Sausalito | CA | | |
| Craig Clark Trail | | Cloverdale | Cloverdale | CA | | |
| Crawford Trail | | San Rafael | San Rafael | CA | hike | hike |
| Creek Trail | | Santa Rosa | Santa Rosa | CA | | |
| Creekside | | Shiloh Ranch Regional Park | Santa Rosa | CA | mtb | mtb |
| Creekside Connector | | Sonoma Coast State Park | Occidental | CA | mtb | mtb |
| Creekside Fire Road | | Cascade Canyon Preserve | Fairfax | CA | | |
| Creekside Fire Road | | Mount Burdell | Novato | CA | | |
| Creekside Nature Trail | | Sugarloaf Ridge State Park | Santa Rosa | CA | hike | hike |
