The preserve is located on the site of the former Hassler Health Home, which served as a tuberculosis sanitarium until the 1970s.
The name 'Pulgas' refers to the Rancho de las Pulgas, a Mexican land grant encompassing the area.
It is one of the few preserves in the Midpeninsula district that maintains a dedicated off-leash dog play area.
The Dusky-Footed Woodrat trail is named for the protected species found in the local scrub habitat.
The ridge provides an ecological transition zone between valley floor ecosystems and coastal mountain habitats.
Pulgas Ridge Open Space Preserve covers 366 acres in the Santa Cruz Mountains, featuring a network of trails ranging from easy walks to steep climbs. The preserve is distinct for its dedicated 0.5-acre off-leash dog area located near the trailhead. The landscape encompasses mixed oak woodland, chaparral, and riparian habitats. Hikers can access panoramic views of the San Francisco Bay and the surrounding canyon geography. The Hassler Trail provides a wide, accessible route, while the Blue Oak and Dusky-Footed Woodrat trails offer more challenging elevation changes. Much of the property was formerly home to the San Francisco County Tuberculosis Sanitarium, with minimal ruins occasionally visible. The preserve is managed by the Midpeninsula Regional Open Space District to prioritize wildlife habitat protection. Mountain biking is prohibited on all trails within the preserve to protect natural resources. The site serves as a vital wildlife corridor for deer, bobcats, and coyotes.
The bench located along the ridge trail that provides an unobstructed view of the San Francisco Bay.
Use the dedicated off-leash dog area near the main entrance to let pets exercise before starting your hike.
Bring extra water as the exposed ridge sections offer little shade during midday heat.
Check yourself for ticks after hiking, as the high grasses and brush are common habitats.
Attempting to access the historic sanitarium ruins, which are largely off-limits and dangerous, and hiking during peak midday heat in summer.
Dogs must be on-leash everywhere except the designated off-leash play area; stay on marked trails to protect sensitive flora.
