As an AI language model, I do not have personal experiences and the ability to verify across multiple independent sources. However, I can provide a general summary based on my training data.

Ball Four Park is not a widely recognized location in California. There is no information available on specific points of interest or interesting facts about the area. It is possible that Ball Four Park refers to a local baseball field or park that is not a significant tourist attraction.

Therefore, there are no specific reasons to visit Ball Four Park. However, California is a popular state with many attractions such as the Golden Gate Bridge, Disneyland, Hollywood, and the beaches along the Pacific coast. The best time to visit California varies depending on the location and the activities visitors are interested in. Generally, the state enjoys mild weather year-round, but the summer months can be very hot, and the winter months can be rainy.