Almanac note · Outdoors
Cucamonga-Guasti gives Ontario a lake-and-picnic park
Cucamonga-Guasti Regional Park is a 150-acre urban park in Ontario with two fishing lakes, picnic shelters, splash-pad space, and event areas.
Ontario has plenty of busy edges, but Cucamonga-Guasti gives the city a softer outdoor stop. It is a 150-acre park in town. It can work for a lunch break, a family picnic, or a fuller park day.
The park has two fishing lakes, picnic tables, covered group shelters, barbecue grills, and splash-pad space. The lakes are stocked in season, with trout listed from November to April and catfish from May to September. Fishing there requires a California fishing license.
It is also built for gatherings. The park has large and small covered shelters, plus picnic tables and barbecue grills around the grounds. That makes it useful for the kind of family day where some people fish, some sit, and kids need room to move.
Check ahead before making plans. Swim schedules, lake notices, and shelter reservations can change the day. It is easy to underestimate this park until you see how much it can hold.
Where to see it
Cucamonga-Guasti Regional Park in Ontario
Official sources
Official source trail
Reviewed June 30, 2026
California Porch explains the path. The official source is still the place to confirm the current rule, fee, form, map, deadline, or office decision.
Use the official page before you spend money, file paperwork, rely on a deadline, or change a property.
Connected places
Where it fits on the map
Open a place page for the county layer, nearby places, and other California entries tied to that local page.
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