The Zodiac Killer’s reign of terror unfolded across a specific geographic corridor in Northern California, primarily targeting the San Francisco Bay Area and the surrounding valleys between December 1968 and October 1969. While the killer’s infamous letters claimed a much wider hunting ground—boasting of victims in Riverside, Southern California, and even hinting at attacks in other states—the confirmed canonical attacks cluster tightly around the cities of Vallejo, Benicia, Napa, and San Francisco. Understanding the precise locations of these crimes is essential not only for historical accuracy but for grasping the logistical patterns that have fueled decades of investigative theories and geographic profiling.
The Epicenter: Vallejo and Benicia
The majority of the confirmed Zodiac attacks occurred in and around Vallejo, a working-class port city in Solano County situated at the northeastern edge of the San Francisco Bay. Vallejo served as the killer’s apparent comfort zone, hosting the first two confirmed double shootings.
Lake Herman Road (December 20, 1968)
The inaugural confirmed attack took place on Lake Herman Road, a secluded, winding stretch of asphalt running between Vallejo and Benicia. David Faraday, 17, and Betty Lou Jensen, 16, were parked at a known lover’s lane turnout near the entrance to the Benicia Water Treatment Plant. The isolation of this location—dark, unpaved shoulders, and minimal traffic—suggested an offender comfortable navigating rural backroads. The killer approached the vehicle on foot, ordered the couple out, and shot them as they attempted to flee. This location established a pattern: targeting isolated couples in vehicles near water or industrial infrastructure.
Blue Rock Springs Park (July 4, 1969)
Just six months later and roughly four miles west of the Lake Herman Road site, the killer struck again at Blue Rock Springs Park in Vallejo. Michael Mageau, 19, and Darlene Ferrin, 22, were parked near the park’s golf course clubhouse parking lot. Unlike the total darkness of Lake Herman Road, this area had some ambient lighting and was closer to residential streets, yet the specific parking spot chosen by the victims was shadowed and secluded. The attacker approached the car with a flashlight, fired multiple rounds through the window, and then walked away, only to return and fire again upon hearing movement. The proximity of this attack to the first—both within Vallejo city limits—strongly indicated a local resident or someone intimately familiar with the city’s geography.
The Expansion: Napa County and Lake Berryessa
On September 27, 1969, the Zodiac shifted his hunting ground northward into Napa County, approximately 25 miles from Vallejo. This move demonstrated mobility and a willingness to travel to specific, pre-scouted locations.
Lake Berryessa (Bryan Hartnell and Cecelia Shepard)
The attack occurred at Lake Berryessa, a large reservoir popular for recreation. Specifically, the victims were stabbed at Picnic Area #1 (often referred to as the "Oak Grove" or "Zodiac Island" area) on the eastern shore near the Knoxville Road bridge. This location was distinct from the previous shootings: it was a daytime attack (approx. 6:30 PM) on a couple relaxing by the water, not in a car at a lover’s lane. The killer wore a bizarre executioner-style hood with the crossed-circle symbol, bound the victims with rope, and stabbed them. The choice of a federal recreation area managed by the Bureau of Reclamation introduced jurisdictional complexity, involving the Napa County Sheriff’s Office and federal park rangers. The killer’s ability to disappear into the dense brush and hills surrounding the lake highlighted his knowledge of the terrain.
The Urban Pivot: San Francisco (Presidio Heights)
The final confirmed Zodiac murder took place on October 11, 1969, in the Presidio Heights neighborhood of San Francisco. This was a radical departure from the previous settings. Paul Stine, a 29-year-old taxi driver, was shot in the head at the intersection of Washington Street and Cherry Street, just blocks from the Presidio Army Base (now a national park) and the affluent mansions of Pacific Heights The details matter here..
- Urban Density: Unlike the secluded parks and roads, this was a busy urban intersection with apartment buildings, pedestrians, and streetlights.
- Witnesses: Three teenagers in a nearby house observed the killer wiping down the cab, providing the only detailed physical description of the suspect (white male, 25-30, crew cut, heavy-set).
- Escape Route: The killer fled on foot north toward the Presidio, a massive 1,500-acre park with dense forestation, offering infinite escape routes into the city or toward the Golden Gate Bridge.
This attack proved the killer could operate under high pressure in a major metropolitan center, shattering the profile of a strictly rural or suburban predator.
The Unconfirmed and Disputed Locations
The Zodiac’s correspondence claimed responsibility for several other crimes outside the canonical four attacks. Investigators and researchers continue to debate the geographical validity of these claims.
Riverside, California (Cheri Jo Bates - October 30, 1966)
The murder of Cheri Jo Bates at Riverside City College (RCC) library annex is the most significant "cold case" linked to the Zodiac. Riverside is roughly 400 miles south of the Bay Area. A "Confession" letter sent to the Riverside Press-Enterprise and the Bates family in 1967, combined with the "Bates Had to Die" letters sent later, created a compelling circumstantial link. Even so, DNA testing on the stamps and envelopes from the Riverside letters did not match the partial DNA profile developed from the Zodiac’s San Francisco letters (though the Zodiac DNA profile itself is debated). If the Zodiac killed Bates, it implies a massive geographic range or a specific connection to Riverside (military, school, or family) in 1966 Small thing, real impact..
Other Claimed Sites
In his letters, the Zodiac claimed victims in:
- Santa Rosa / Sonoma County: Referencing the "Santa Rosa hitchhikers" (possibly the 1972 Yvonne Weber/ Maureen Sterling murders, though these post-date the canonical timeline).
- Modesto / Stanislaus County: Vague references to killings in the Central Valley.
- Oakland / East Bay: Claims of shootings on the freeways.
Most experts consider these claims to be braggadocio designed to inflate the killer’s mythology and confuse law enforcement regarding his true base of operations.
Geographic Profiling: What the Locations Reveal
The spatial distribution of the confirmed attacks has been the subject of rigorous geographic profiling, most notably by former FBI profiler John Douglas and environmental criminologists like Kim Rossmo.
The "Circle Theory" and Center of Gravity
If you plot the four confirmed attack sites (Lake Herman Rd, Blue Rock Springs, Lake Berryessa, Presidio Heights) on a map, they form a rough triangle or distorted circle covering the North Bay.
- Vallejo sits at the center of the first two attacks.
- Napa sits north.
- San Francisco sits southwest.
The "Center of Gravity" (the mathematical mean of the crime sites) falls squarely in Vallejo or the immediate unincorporated areas of Solano County. This supports the "Marauder" offender model—a killer who operates outward from a home base (anchor point) rather than a "Commuter" who travels from a distant home to a specific hunting zone.
