From the Heritage Trust website, "The Highland Park Heritage Trust is dedicated to the preservation of Los Angeles’ Arroyo Seco communities of Highland Park, Garvanza, Mt. Washington, Hermon and Montecito Heights and Cypress Park."

The trust offers historic home tours and walking tours of the Heritage Trust's neighborhoods. The website offers visitor information and information regarding upcoming events.

Indian Grinding Rock State Historic Park nestles in a little valley 2,400 feet above sea level with open meadows and large valley oaks that once provided the native Americans of this area with an ample supply of acorns. The park was created in 1968 and preserves a great outcropping of marbleized limestone with some 1,185 mortar holes—the largest collection of bedrock mortars in North America. The Museum has been designed to reflect the architecture of the traditional roundhouse. Exhibited in this two-story museum are outstanding examples of the technology and crafts of the Miwok and other Sierra Nevada native American groups.

The park offers exhibits, tours, educational programs, and occasional recreational and educational events.

The California State Railroad Museum in Old Sacramento is a tribute to the role of the "iron horse" in connecting California to the rest of the nation. The museum features 21 restored locomotives and cars, some dating back to 1862. There is a full-scale diorama of an 1860s construction site high in the Sierra Nevada as well as a bridge elevated 24 feet above the museum floor.

The museum offers exhibits, train rides, a short film, tours, research library access, educational programs, and recreational and educational events.

The Park is the site of a water-powered grist mill that was built in 1846. It was once the center of social activity as Napa Valley settlers gathered to have their corn and wheat ground into meal or flour. The owner of the mill was Dr. Edward Turner Bale. He received the property in a land grant from the Mexican government and lived near the site until his death in 1849. The mill remained in use until the early 1900s. The mill and its 36-foot water wheel are protected as a state historic landmark and have been partially restored. A trail connects the historic park to Bothe-Napa Valley State Park. Additionally, the park includes the site of the first church in the Napa Valley as well as the Pioneer Cemetery.

The park offers exhibits, tours, and demonstrations.

Marshall Gold Discovery State Historic Park secures for the people and makes available for their observation, inspiration, and enjoyment, the gold discovery site and its environs as an accurate portrayal of the story that unfolded at the time of the discovery and Gold Rush. The park's interpretive program primarily embraces the period from 1847 through 1852, but also shows the town of Coloma as it developed. Marshall Gold Discovery State Historic Park is the place where James W. Marshall found flecks of gold in the tailrace of the sawmill he was building for himself and John Sutter. This discovery in 1848 changed the course of California's and the nation's history. Visitors can see a replica of the original sawmill and over 20 historic buildings including mining, house, school, and store exhibits. Visitors have the opportunity to try panning for gold in the American River and enjoy hikes and picnics under the riparian oak woodlands. Overlooking the river canyon, where the gold discoverer rests today, visitors ca see California's first historic monument, the statue of James Marshall pointing at his gold discovery site .

The park offers exhibits, tours, educational programs, living history events, and other recreational and educational events.

The San Juan Capistrano Historical Society seeks to preserve and share the history of San Juan Capistrano, California. To this end, the society operates the O'Neill Museum, a circa 1880 home. The structure was once the residence of a saloon owner, and is now furnished to an 1880s appearance.

The society offers period rooms, 90-minute walking tours, archival access, and oral histories.

The Underground Gold Miners Museum presents the history of Alleghany, California and its mining district; the Sixteen to One Mine; and area geology. Areas of focus include underground hardrock mining technology and equipment, as well as the lives of California's underground gold miners. The Sixteen to One Mine remained an active gold mine between circa 1896 and 1965.

The museum offers exhibits, and is open for special events and by appointment only.

The town's old Gold Rush-era business district has been preserved, with shops, restaurants, and two hotels. Visitors have the chance to time-travel to the 1850s, imagining life when gold miners rubbed shoulders with businessmen and the other residents in Columbia. Visitors can experience a bygone era watching proprietors in period clothing conduct business in the style of yesterday. There are opportunities to ride a 100 year-old stagecoach, pan for gold, or tour an active gold mine.

The park offers exhibits, tours, living history events, educational programs, and educational and recreational events.

The Wally Parks NHRA Motorsports Museum addresses the impact of motorsports on U.S. culture. Collections include dragsters, hot rods, and artifacts pertinent to the history of automobile racing. The site includes a garage where visitors can view restorations in progress and talk with the restoration specialists.

The museum offers exhibits.