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Cornell Lab of Ornithology


San Francisco Bay Area Network Weed Watchers

Weed Watchers

is run by the

National Park Service San Francisco Bay Area Network,

a partnership between

Golden Gate National Recreation Area and Point Reyes National Seashore

Weed Watchers at work



Weed Watchers patrol the roads and trails of the national parks in San Mateo, San Francisco, and Marin counties, detecting weeds as they first invade. Discovering weeds before they become well-established is critical to reducing damage to ecosystem integrity, preventing the loss of habitat for rare plants and animals, and preventing costly natural resource management.


Open the Weed Watchers website



Topic - invasive plants, weeds, non-native, mapping

Audience - hikers, botanists, GPS enthusiasts

Location - San Francisco Bay Area

Goals - mapping for restoration planning

Other - advanced training, 6-month commitment



Andrea Williams, Natural Resource Specialist  tiny email icon


Jennifer Jordan, Lead Biological Science Technician  tiny email icon