The California Office of Environmental Health Hazard Assessment has issued a safe eating advisory for any fish caught in Lake Evans, in the Western portion of the park, due to elevated levels of mercury and PCBs.

The revitalization was championed by local residents such as Pat Stewart, current chair of Friends of Fairmount Park.

[4] Fairmount Park offers a golf course,[5] two tennis courts, public barbecues, boat rentals (including pedal boats that are handicap accessible), sailing and fishing on Lake Evans, running, jogging and walking on the Santa Ana River Trail, a number of exercise classes held in the park, and the playground.

It also has a well maintained lawn bowling court which first opened in the 1920s, and a Rose Garden with a gazebo which is a popular location for photographs of significant community events.

In 1949, the American Legion installed a Water Buffalo amphibious tank on a ramp going down into Lake Evans, to commemorate Riverside's role in the manufacture of the vehicle during World War II.