City of Irwindale dog rules
Leash law only: dogs on a leash up to 6 feet in public places (County animal code).
Each rule, in the law's own words1 rule
Leash law only: dogs on a leash up to 6 feet in public places (County animal code).
Source: Rules: Irwindale Municipal Code (Irwindale Municipal Code §6.04.010 (LA County Code Title 10))
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 This guide restates published rules and OpenStreetMap data, which can be out of date or incomplete.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.