Parks

Bear Necessities at Cucamonga-Guasti
2026-04-25 13:30 - 15:00 (America/Los_Angeles) | Cucamonga-Guasti, 800 N. Archibald Avenue, Ontario, CA, 91764, United States
Join us at Cucamonga-Guasti Regional Park on Saturday, April 25, as we explore some “beary” important safety tips and tricks when a bear is nearby and how to identify the different types of bears native to our region.
Forget about your worries and your strife when you learn some “paws-itively” wild facts about bears native to North America. We’ll also talk about how to respect our furry wildlife neighbors. It’s a fun way to learn about bear biology and just how necessary the conservation is when recreating outdoors. Plus, we will conduct a field experiment. Join us! It would be unbearable without you!
Admission is $15 per vehicle and free for those camping with us at Prado. All ages are welcome, including leashed pets. All supplies will be provided while they last.
Park hours are 7:30 a.m. to 6:30 p.m. Bring the whole family, pack a lunch and explore the great outdoors before or after the activity.
For more information on Regional Parks, visit parks.sbcounty.gov, or follow parks on Facebook and Instagram to stay connected with the latest park news and events.

Splash Pads & Snow Cones at Cucamonga-Guasti
2026-06-18 11:00 - 13:00
Cool off and play the day away at Regional Parks with a fun-filled day at the splash pad complete with exciting games and refreshing snow cones at Cucamonga-Guasti Regional Park, Thursday, June 18, from 11 a.m. to 1 p.m.

Whether you’re racing through the splash pad, tossing bean bags or just relaxing in the sun, it’s the perfect way to enjoy outdoor recreation at Regional Parks.

Snow cones are free while supplies last.

Cucamonga-Guasti Regional Park offers the perfect landscape to spend the day at the park fishing, biking, on the playground or splash pad, picnicking and grilling. Pack the car and come out for this exciting day of exploring the great outdoors.

Guasti is open daily from 7:30 a.m. to 8 p.m. and is located at 800 N. Archibald Ave. in Ontario.

General park admission is $10 per vehicle Mon-Fri, $15 per vehicle Sat-Sun, and $20 per vehicle on holidays.

Follow Regional Parks on Instagram at www.instagram.com/sbcountyparks for the latest park news and event updates.

SparkleFizz Science Lad Activity at Cucamonga-Guasti
2026-06-25 11:00 - 13:00
Get ready to mix, fizz, and explore with Regional Parks for this exciting hands-on science activity at Cucamonga-Guasti Regional Park, Thursday, June 25, from 11 a.m. to 1 p.m., celebrating the country’s 250 Semiquincentennial anniversary of the Declaration of Independence.

Bring the whole family and discover how safe and simple food ingredients like sugar and vinegar can create an amazing chemical reaction that looks just like a burst of fireworks.

As you watch your creation come to life, you’ll also learn how chemistry is happening all around us in fun and surprising ways.

It’s a colorful, hands-on experiment that blends creativity with science and turns your table into a mini-celebration of fizz and motion!

Don’t miss this chance to explore, create, and learn together — it’s the perfect family-friendly activity that brings a little sparkle, a little science, and a whole lot of fun!

All ages are welcome. Leashed pets are welcome too! All supplies will be provided while they last.

Cucamonga-Guasti Regional Park offers the perfect landscape to spend the day at the park fishing, biking, on the playground or splash pad, picnicking and grilling. Pack the car and come out for this exciting day of exploring the great outdoors.

Guasti is open daily from 7:30 a.m. to 8 p.m. and is located at 800 N. Archibald Ave. in Ontario.

General park admission is $10 per vehicle Mon-Fri, $15 per vehicle Sat-Sun, and $20 per vehicle on holidays.

Follow us on Facebook and Instagram for parks news and events updates.

Rainbow Bubbles at Cucamonga-Guasti
2026-07-07 11:00 - 13:00
Get ready to blow, bubble and create something magical with Regional Parks in this hands-on family Art in the Park: Rainbow Bubbles activity at Cucamonga-Guasti Regional Park on Tuesday, July 7, from 11 a.m. to 1 p.m.

NOTE: Participants are asked to bring an empty water bottle.

Step into a world of color and foam as you watch bright, swirling bubbles come to life right in front of you. With just a few simple materials, you’ll create long flowing bubble “snakes” that grow and stretch.

This playful, magical sensory experience is all about experimenting, exploring and having fun together.

Don’t miss this exciting opportunity to create, play, and discover — perfect for families looking to add a little extra color and joy to their day!

All supplies will be provided while they last. All ages are welcome! Leashed pets are welcome too!

Cucamonga-Guasti Regional Park offers the perfect landscape to spend the day at the park fishing, biking, on the playground or splash pad, picnicking and grilling. Pack the car and come out for this exciting day of exploring the great outdoors.

Guasti is open daily from 7:30 a.m. to 8 p.m. and is located at 800 N. Archibald Ave. in Ontario.

General park admission is $10 per vehicle Mon-Fri, $15 per vehicle Sat-Sun, and $20 per vehicle on holidays.

Follow Regional Parks on Instagram at www.instagram.com/sbcountyparks for the latest park news and event updates.

Splash Pads & Snow Cones at Guasti
2026-08-06 11:00 - 13:00
Cool off and play the day away at Regional Parks with a fun-filled day at the splash pad complete with exciting games and refreshing snow cones at Cucamonga-Guasti Regional Park, Thursday, Aug. 6, from 11 a.m. to 1 p.m.

Whether you’re racing through the splash pad, tossing bean bags or just relaxing in the sun, it’s the perfect way to enjoy outdoor recreation at Regional Parks.

Snow cones are free while supplies last.

Cucamonga-Guasti Regional Park offers the perfect landscape to spend the day at the park fishing, biking, on the playground or splash pad, picnicking and grilling. Pack the car and come out for this exciting day of exploring the great outdoors.

Guasti is open daily from 7:30 a.m. to 8 p.m. and is located at 800 N. Archibald Ave. in Ontario.

General park admission is $10 per vehicle Mon-Fri, $15 per vehicle Sat-Sun, and $20 per vehicle on holidays.

Follow us on Facebook and Instagram for parks news and events updates.

Catfish Derby at Cucamonga-Guasti
2026-08-22 17:30 - 22:30
Regional Parks is excited to welcome back night fishing opportunities for all ages with the catfish derby at Cucamonga-Guasti Regional Park, Saturday, Aug. 22, from 5:30-10:30 p.m.

Check-in and registration begins at 4 p.m.

Prepay Derby Fees and Vehicle Admission
www.parkreservations.sbcounty.gov/san-bernardino/programs

DERBY FEESFees are $20 per person and $15 per vehicle. A fishing license is required for all participants ages 16 years and older.

Participants will receive a wristband and packet with derby entry forms and rules. The derby is rain or shine and no refunds will be given. Both the small and large lakes will be open to derby contestants.

Regional Parks will have a weigh-in station available and encourages participants to allow plenty of time to weigh and enter their fish prior to the 10 p.m. cutoff time.

Derby cash prizes will be awarded for:

First place: $1,000
Second place: $500
Third place: $250

Winners do not need to be present to claim their prize(s). Winners will be announced at approximately 10:45 p.m. at the Regional Parks weigh-in station at the snack bar near the large lake.
A food truck will be on site to purchase food.

Cucamonga-Guasti Regional Park is located at 800 N. Archibald Ave. in Ontario (next to Top Golf).

Park summer hours are 7:30 a.m. to 8 p.m. during the summer.
