![Lake-Gregory-Fishing-Photo-020720 Fish in water](https://parks.sbcounty.gov/wp-content/uploads/sites/34/2020/02/Lake-Gregory-Fishing-Photo-020720-e1582314052673.png?x26090)
31-Day Trout Derby Competition
Cucamonga-Guasti 800 N. Archibald Avenue, Ontario, CA, United States31-Day Trout Derby Competition Welcome to our 31-Day Trout Derby. Please read the rules and download the derby entry form to enter. This is a skilled event open to the general public and anglers of all ages. March 1, 2021 through March 31, 2021 at the following parks: Cucamonga-Guasti Regional Park Glen Helen...