

Cucamonga-Guasti Regional Park
150-acre Ontario county park with swim lagoons, fishing lakes, and waterslides minutes off the 10.
🌟 Why Locals Love It
Closest swim lagoon and slide combo for west-IE families.
What to Expect
Swimmers, anglers, group picnics, lifeguards in summer.
💡 Good to Know Before You Go
Vehicle entry fee + swim fee.
📍 Local Tip
Arrive at opening for the cleanest lagoon water.
Best Time to Visit
May–September for swimming.
Notable Features
Amenities
More to Explore in the IE
Explore Everything IE
Events & Culture
Restaurants & Drink
Mountains & Lakes
Everything IE is your premium guide to the Inland Empire — Riverside County and San Bernardino County. Events, restaurants, parks, schools, mountains, lakes, sports, and more — sourced from official departments and trusted institutions, curated for the people who call the IE home. Part of the Everything California network.
Explore More of California
The Everything Network — 16 California Regions
