City of National City dog rules
Leash law: up to 6 ft (not verified).
Each rule, in the law's own words1 rule
Leash law: up to 6 ft (not verified).
Source: Rules: National City Municipal Code (National City Municipal Code §8.16.020, §8.04.015)
Places this rule covers
Open to dogs now first, then off-leash places and those with a photo.
Check posted signs. They are the rule on site. This guide restates published rules and OpenStreetMap data, which can be out of date or incomplete. It is not legal advice.