The Bidwell Mansion State Historic Park Visitor Center is open to the public on Saturdays, Sundays, and Mondays from 11 a.m. until 5 p.m.
In addition, the park can be reached by phone at (530) 895-6144, and by mail at 525 Esplanade, Chico, CA 95926.
You can also use the below form to contact park staff.