From the Walnut Creek Downtown Business Association website:
Artists arrive in Downtown Walnut Creek for a spring celebration during the 68th Semi-Annual Fine Arts and Crafts Festival. This semi-annual event extends along the sidewalks of North Main and the closed street of Locust between Mt. Diablo Boulevard and Civic Drive.
Dates: Saturday, April 28th – Sunday, April 29th
That’s amazing this has been going on for 68 years, I wonder what they were selling back then.