Are there any decent (minor league quality fields) softball complexes within an hour or near LA?

Big League Dreams complex is in Chino Hills. Those are replica fields of Wrigley, Fenway and Yankee all done in turf. They host baseball and softball tournaments. I am sure there are plenty. I grew up there but moved many years ago so can't tell you what is currently there.

There are a ton, Blair Field in Long Beach, Cerritos College, CSU Fullerton, Lake Elsinore Diamond, Rancho Cucamonga Quakes, San Bernardino IE 66r's, Saddleback College, and that is just the tip of the iceberg.