California Building, Historic market hall and National Register of Historic Places site in Reno, Nevada.

The California Building is a Spanish Colonial Revival structure at 1000 Cowan Dr. in Idlewild Park, Reno. It was built by the state of California for the Transcontinental Highway Exposition of 1927, and its construction, plus a related tent annex and exhibits, cost $100,000 over a two-year period ending that year.

The California Building was erected by the state of California for the Transcontinental Highway Exposition of 1927, built over two years at a cost of $100,000 including a tent annex and exhibits. After the fair it served as a meeting hall for Darrel Dunkle Post No. 1 of the American Legion until 1938, when ownership returned to the city of Reno. It was listed on the National Register of Historic Places in 1992.

The building was put up by the state of California for the 1927 Transcontinental Highway Exposition and housed exhibits of California cities and counties. After the fair it served as a meeting hall for Darrel Dunkle Post No. 1 of the American Legion until 1938, when ownership returned to the city of Reno.

The building sits at 1000 Cowan Dr. inside Idlewild Park, southwest of downtown Reno, so reach it on foot or by car through the park rather than from the central grid. It is a park building rather than a staffed museum, so check current access before making a special trip.

The building and its tent annex cost $100,000 and took two years to complete, finishing in 1927. After the exposition it served as a meeting hall for Darrel Dunkle Post No. 1 of the American Legion until 1938, when ownership passed back to the city of Reno.