Rossmoor, Walnut Creek, California

It was one of the first "active adult" communities for residents 55 years or older in the San Francisco Bay Area.

In the 1930s, Scottish-American industrialist Stanley Dollar constructed an estate in Tice Creek Valley near Walnut Creek in Contra Costa County, where the Dollar family bred Hereford cattle and raised show horses.

Cortese had previously been involved in the development of a different community also called Rossmoor in Orange County.

[citation needed] The "Leisure World" trademark is still in use by the Cortese family, but has not been applied to Rossmoor in Walnut Creek for years.

[citation needed] Amenities include two NCGA-rated golf courses (one nine-hole and one 18-hole), a large indoor pool and fitness complex, two outdoor pools, six tennis courts, lawn bowling greens, bocce courts, hiking trails and table tennis facilities.