Cucamonga-Guasti - Onatrio, CA

Cucamonga-Guasti Regional Park, located in the heart of Ontario, California, is a public urban fishery offering accessible, family-friendly fishing opportunities throughout the year. The park features two small lakes that are managed by San Bernardino County and stocked regularly with rainbow trout in the cooler months and channel catfish in the warmer season.

Trout stocking typically begins in late fall and continues through early spring, providing reliable winter action. Anglers find success using floating baits like PowerBait, nightcrawlers, and small spinners or spoons. Morning hours are ideal due to lower temperatures and less angling pressure. Stocking trucks often release fish along easily accessible areas, allowing shore anglers to target trout efficiently.

In the summer, the lakes are stocked with catfish that respond well to chicken liver, shrimp, and stink bait fished along the bottom. Evenings are often the most productive time for catfish as water temperatures warm. Bluegill and other panfish are also present and offer consistent action using red worms or small jigs under a float.

The park includes picnic areas, shaded seating, restrooms, and children’s play equipment, making it an excellent location for family outings. Shore fishing is the only option, and a daily vehicle fee is charged. All anglers aged 16 or older must possess a valid California fishing license. Cucamonga-Guasti remains one of the most convenient fishing spots in the Inland Empire for both casual and beginner anglers.