Calistoga is a city in Napa County, in California's Wine Country. During the 2010 census, the population was 5,155. The city was incorporated on January 6, 1886. In 1868 the California Pacific Railroad was built to Calistoga, becoming a hub and destination. The name comes from a combination of California and Saratoga referring to Saratoga Springs, New York, which is famous on the east coast for its hot springs. Founders of the town wanted to make Calistoga the Saratoga Springs of California drawing tourists to its hot springs.

Petaluma (; Coast Miwok: Péta Lúuma) is a city in Sonoma County, part of the North Bay sub-region of the San Francisco Bay Area, located 37 mi (60 km) north of San Francisco. Its population was 57,941 according to the 2010 Census.The Rancho Petaluma Adobe, located in Petaluma, is a National Historic Landmark. Construction began in 1836 by order of General Mariano Guadalupe Vallejo, who was then the Commandant of the San Francisco Presidio. It was the center of a 66,000-acre (270 km2) ranch stretching from Petaluma River to Sonoma Creek. The adobe is considered one of the best-preserved buildings of its era in Northern California. Other historical buildings include the Washoe House, built in 1859, and the Petaluma Creamery, established in 1903, which marked Petaluma as an agricultural center for eggs and dairy. The name comes from the Coast Miwok name Péta Lúuma (lit. 'hill backside'), a village once located near the present-day city borders. Petaluma has a well-preserved, historic city center which includes many buildings that survived the 1906 San Francisco earthquake.

Sonoma is a city in Sonoma County, California in Sonoma Valley. Known as a part of Wine Country in the Sonoma Valley AVA Appellation, Sonoma is the home of the Sonoma International Film Festival and a historic town plaza, a remnant of the town's Mexican colonial past. Sonoma's population was 10,648 as of the 2010 census, while the Sonoma urban area had a population of 32,678.