San Diego Bayfair will close Mission Bay to all other boats for three days in 2025

The Coast Guard will enforce a special local regulation for the San Diego Bayfair event in Mission Bay, California, from September 12 to September 14, 2025. During this period, all other vessels and people are prohibited from anchoring, blocking, or loitering in the regulated area without specific authorization.

Every year, local events like boat races and festivals require temporary closures of public waterways. These small, routine rules mean that for a few days, a public resource becomes a private one. This specific rule is a recurring event, but it highlights the constant negotiation between public access and private use of shared infrastructure.