water park slides
Guasti splash pad
Green view of Guasti lake
Guasti Cabana
Guasti lake view
Pedal boat on Guasti Lake
Mountain view at Guasti
Guasti sidewalk
Guasti Lake 2
Guasti Lake
Fishing at Guasti
Orange water slide
2 Water slides
Guasti Pool
blue lake
Yellow flowers
Guasti shelter
Sunset over Guasti lake
Ducks on a shoreline

Cucamonga-Guasti Regional Park

800 N Archibald Ave, Ontario, CA 91764 909.387.2757


  • News Update: Cucamonga-Guasti is open on a limited scale.
  • Due to an office fire, the phone system is currently down. Please call our main office at 909.387.2757.
  • Limited restroom availability.
  • Visit COVID-19 Park Rules for park restrictions.


  • Daily: 7:30 AM to 5 PM
  • Closed Christmas Day

Summer (Memorial weekend through Labor Day weekend)

  • Monday-Friday: 7:30 AM to 5 PM
  • Saturday-Sunday: 7:30 AM to 7 PM

Cucamonga-Guasti Regional Park, located blocks away from LA/Ontario International Airport in Ontario offers a great low-cost get away from the hustle of the city for a day of family fun.

The park provides 150 acres of outdoor recreation activities in an urban setting. There is a wide range of activities including two lakes for fishing, a swim complex with water slides, splash pad, picnic tables and group picnic shelters for corporate events, large parties and family reunions.

Lake Update

Sign with fishing caution images about lake water containing levels of bacteria.

All Lakes

Notice that recent testing of Cucamonga-Guasti Regional Park’s lake water has shown low levels of Cyanobacteria. Fishing is safe and will remain open, however, please take caution by following the posted rules.

Español (todos lagos)

Atencion: Las pruebas recientes del agua del lago en Cucamonga-Guasti Parque Regional han mostrado bajos niveles de Cianobacterias. La pesca es segura y permancecera abierta, sin embargo, tenga cuidado al seguir las siguientes reglas.


Peddle Boats at Guasti Park
two people on a pedal boat

Boating and Water Sports

Cucmaonga-Guasti Regional Park offers a wide range of recreational boating and water sports such as peddle boats, row boats and canoes.


  • The peddle boats are operated by Pedal Port. For pricing or more information, visit pedalport.biz
Man helping children fish at Guasti park.
Father fishing with two boys at Guasti park.


Cucamonga-Guasti Regional Park offers the sport of fishing year-round at our two lakes. We stock trout from November to April and Catfish from May to September. A California state fishing license is required to fish at our parks and we offer fishing workshops and derbies throughout the year.

The lakes are stocked every Thursday, weather permitting. The lakes are closed on stocking days.

water park slides
Guasti swimming pool
2 Water slides


Cucamonga-Guasti Regional Park offers summer heat relief at our pool and water slides. The pool is open on Memorial Day weekend and closes Labor Day weekend. Check with park for summer hours. All our pools are monitored by lifeguards.

Pool Amenities

  • 220-foot double-flume water slide (handicapped accessible)
  • One-half acre swim lagoon    
  • Grassy area for sun bathing and picnics


2 Waterslides

Water Slides

Cucamonga-Guasti Regional Park offers visitors off all ages to come out during the summer and make a splash in our adventurous water slides. Our slides are open from Memorial Day weekend through Labor Day weekend each year. Our slides are handicap accessible.

Height Minimum Requirement

Children must be 48″ to ride water slides.

Slide Amenities

  • 220-foot double-flume water slide (handicapped accessible)  
  • Grassy area for sun bathing and picnics
Guasti swimming pool

Swimming Pool

Cucamonga-Guasti Regional Park pool is open on Memorial Day weekend and close Labor Day weekend. The pool is monitored by lifeguards. Our pool is handicap accessible.

Pool Amenities

  • One-half acre swim lagoon    
  • Grassy area for sun bathing and picnics
Landscape photo of shelter at Guasti
Photo of picnic shelter at Guasti

Picnic Shelters

Cucamonga-Guasti Regional Park serves as great site for your next event, family gathering or company picnic. This park offers four large covered picnic shelters and two small covered shelters to rent. In addition, we offer picnic tables throughout the park as well as barbecue grills.

Fees are dependent on the type of event and amount of space needed. Some events will require an Interim Use Permit Please contact us directly for more information.

Photo of the playground at Guasti


Cucamonga-Guasti Regional Park offers open spaces and safe, clean playgrounds for youth and families to enjoy while promoting the building blocks of social interaction.

girls at splash pad
Image of Splash Pad at Guasti

Splash Pad

Cucamonga-Guasti Regional Park offers a splash pad for water play. This area is a zero-depth water playground for children of all ages to enjoy.

Guasti Cabana


Cucamonga-Guasti Regional Park offers cabanas at this location on a first-come, first-serve basis. Contact us to for rental pricing.

Admission Fees

Fees subject to change.

Park Entrance

  • Vehicles    
    Monday – Fridays (excluding holidays and special events) $8.00
    Weekends and Holidays (excluding special events) $10.00

  • Pedestrian     

  • Dogs
    $1.00/dog. Must be on 6′ leash at all times. (Fee does not apply to assistance dogs for qualified individuals with a disability)

Annual Entrance Passes

  • $125.00 – Mulit-Park Pass. Valid for 12 months from date of purchase, excludes special events & holidays. (Valid at all parks except Lake Gregory, Moabi and Calico.)

  • $60.00- Individual Park Pass. Valid for 12 months from date of purchase, excludes special events & holidays. (Valid at Cucamonga- Guasti Regional Park ONLY!)

  • $100.00 – Senior Citizen/ Qualified Individual with a Disability, veterans and active-duty personnel in the United States Armed Services Annual Vehicle Entrance Pass. Valid for 12 months from date of purchase, excludes special events & holidays. (Valid at all parks except Lake Gregory, Moabi and Calico.)

  • $25.00- Pedestrian Annual Pass. Includes one (1) dog. Valid for 12 months from date of purchase, excludes special events & holidays. (Valid at all parks except Lake Gregory, Moabi and Calico.)

Fishing Fees

  • Monday-Wednesday Daily Fishing Permit: $10.00/person, all ages. 
  • Thursday – Sunday Daily Fishing Permit: $12.00/person, all ages.
  • All Ages Fishing Derby: $20.00 per person.

Swimming and Water Slide Fees

  • Call park for days and hours of operation.

Swim entrance

  • Friday – Sunday $7.00/person age 4 years and older. (Excluding Holidays and Special Events). Children 3 and under are free.

Water Slide

  • Single ride token, $2.00

  • Swim Admission plus All Day Water slides  – $12.00 (Excluding Holidays and Special Events)

  • Swim Admission plus All Day Water slides – $17.00 (Holidays weekends and Special Events)

  • Must be at least 48″ tall to ride slide.  Contact park for days and hours of operation.

Day Use Education Excursion Program

  • Groups with twenty (20) or more youths sponsored by established public or private institutions, such as schools, churches, Boy/Girl Scouts, YMCA/YWCA, are eligible for a group rate providing a confirmed reservation is made with the park 48 hours in advance of arrival.

  • Entrance fee – $3.00 per person (cannot be used with any other discount).

  • Swimming fee, weekdays only, except holidays and special events – $3.00 per person, Adults and youth.

  • Children (three and under) No charge.

Picnic Reservation Fees

Fees may be different then listed due to the nature of your event. Some events will require an Interim Use Permit. Call the park for more information.

  • Large group shelter – $400.00 
  • Small group shelter – $100.00
  • Non-refundable reservation fee: $7.00

Fees* are non-refundable if the shelter is canceled less than 30 days before reservation date.

Liability insurance required for picnic shelter reservations. Please ask Reservation Office for details.

Upcoming Events

There are no upcoming events.



Have a question? Give us a call:

Cucamonga-Guasti Regional Park

800 N Archibald Ave, Ontario, CA 91764