Fairview-Riverside State Park, State park in Madisonville, Louisiana, US.

Fairview-Riverside State Park is a natural area along the Tchefuncte River in Madisonville featuring mature oak trees and walking routes through wooded grounds. The space includes camping areas, boat ramps, and access points for fishing throughout the property.

The Otis House was built in 1885 by William Theodore Jay, who owned a nearby sawmill. In 1906 the Jay property passed to Charles and William Houlton, whose Houltonville settlement had a store, a post office and about 250 sawmill workers. Frank Otis of Otis Manufacturing bought it in 1936 as a summer home and left the house and 99 acres to Louisiana in 1962; it joined the National Register in 1999.

The Otis House and grounds carry the name of Frank Otis, whose family owned Otis Manufacturing in New Orleans; he bought the property in 1936 and used it as a summer home until his death in 1962. He left the house and 99 acres to Louisiana for public recreation. The park later appeared in the eighth season of The Amazing Race.

The park has multiple improved campsites and boat launching areas spread across the grounds for different types of visitors. The walking paths remain accessible year-round but conditions vary depending on rainfall and season.

The park appeared in the eighth season of the reality show The Amazing Race. The Otis House itself served as a filming location for the 1981 horror film The Beyond and the 1997 film Eve's Bayou, so visitors may recognize its exterior from the screen.