Mannion Knoll Park and Open Space is located on the northwest side of town, near Cypress Hill Memorial Park. It's 15.1 acres is named after beloved Petaluma historian Ed Mannion. It's known mostly for it's series of trails that lead through wooded eucalyptus groves, however there are also two small playgrounds that can be found off Magnolia Avenue, where a small parking lot is located.
Location: 941 Elm Drive, Petaluma, CA, 94952
