The Camp Roberts Historical Museum is the largest Army museum in California, and is located on Camp Roberts, California, just halfway between San Francisco and Los Angeles on US Hwy. 101 (12 miles north of Paso Robles) at exit 244.  
The Museum is the repository for the entire history of one of America's largest and most historic Army installations, and is open to the general public on Thursdays and Saturdays, from 9 a.m. to 4 p.m. (excluding some National Holidays). 
Groups are welcome, and lunch may be arranged ahead of time at the new dining facility  There is also a shaded picnic area in the back garden of the Main Museum for those bringing their own lunches.  There are also other food options on the camp. 
Open to the public on Thursdays and Saturdays, 9AM to 4PM. Admission is always FREE to all! 
Access:  If visitors do not possess an active or retired military ID card, they must stop at the Security Office to obtain a visitor pass before entering the Camp. A Driver's license, vehicle registration and proof of insurance will be needed to get the pass.