# Things to do with kids in Ontario, CA

> 12 upcoming family events and 2 places and ongoing programs in Ontario, CA (San Bernardino County, CA), in the Riverside–San Bernardino–Ontario area. Listings whose address is in this town. Dates and times are Pacific Time. Today is Sat, Oct 24.

Source: Grassy Knees is a directory of real family events, places and programs for kids across major U.S. metro areas, where every listing is researched from the organizer’s own page and shows the date we last checked it. https://grassyknees.com covers 42 metro areas as of Oct 24, 2026, with more added regularly. About: https://grassyknees.com/about
Freshness: listings are re-checked on a daily research run (latest check 2026-10-24), and new events are added as organizers post them. Sell-outs, weather cancellations and time changes show up on the live page first: https://grassyknees.com/riverside/towns/ontario-ca

## Events ahead

- [Discovery Day: Dia de los Muertos](https://grassyknees.com/riverside/activities/discovery-day-dia-de-los-muertos--listing-11b9f0c53b29029197bb2620) — Sat, Oct 24 · 11:00 AM – 12:00 PM · Ovitt Family Community Library, Ontario · Ages 3–5 · checked Oct 13. Preschoolers discover what Dia de los Muertos is all about at the Ovitt Family Community Library: learn key vocabulary words, create sugar skull-inspired art and share memories…
- [LEGO Family Fun Club](https://grassyknees.com/riverside/activities/lego-family-fun-club--listing-ecfab4dd5e0bef91c15f9a30) — Mon, Oct 26 · 5:00 PM – 6:00 PM · Lewis Family Branch Library, Ontario · checked Oct 13. LEGO Family Fun Club at the Lewis Family Branch Library is designed for kids and their grown-ups to build side by side: create, collaborate and enjoy hands-on time together…
- [Spooktacular Halloween](https://grassyknees.com/riverside/activities/spooktacular-halloween--listing-83ef8157a7e1debf41ed6508) — Mon, Oct 26 · 4:30 PM – 5:30 PM · Ovitt Family Community Library, Ontario · Ages 5–12 · checked Oct 13. A ghoulish good time for ages 5-12 at the Ovitt Family Community Library: test out your costume before Halloween, create crafty jack-o-lanterns and chalk art, and guess the…
- [Flowers for Tia Luz Maria: Dia de los Muertos author reading with Cynthia De La Torre](https://grassyknees.com/riverside/activities/flowers-for-tia-luz-maria-dia-de-los-muertos-author-reading-with-cynth--listing-6fa98087882edbcc160f5663) — Thu, Oct 29 · 5:00 PM – 6:00 PM · Lewis Family Branch Library, Ontario · checked Oct 13. Celebrate Dia de los Muertos at the Lewis Family Branch Library with local author and illustrator Cynthia De La Torre as she reads her debut book Flowers for Tia Luz Maria, the…
- [Ontario Halloween Costume Contest & Trunk or Treat](https://grassyknees.com/riverside/activities/ontario-halloween-costume-contest-and-trunk-or-treat--listing-a894cbfd4d572d91a976da3a) — Thu, Oct 29 · 3:00 PM – 8:00 PM · Ontario City Hall · All ages · Free · checked Oct 13. City of Ontario Recreation special event on October 29, 2026 from 3:00 PM to 8:00 PM at Ontario City Hall, 303 East B Street. The event page lists a Halloween costume contest and…
- [Halloween Haunt for Little Learners](https://grassyknees.com/riverside/activities/halloween-haunt-for-little-learners--listing-f07b91397b9ed31be515f760) — Fri, Oct 30 · 10:30 AM – 12:00 PM · Ovitt Family Community Library, Ontario · Ages 0–5 · checked Oct 13. The Ovitt Family Community Library spins up a web of Halloween fun for ages 0-5: little spiders scurry through a treat parade, get tangled in dramatic play and weave their way…
- [Ontario Día de los Muertos Celebration & Procession](https://grassyknees.com/riverside/activities/ontario-dia-de-los-muertos-celebration-and-procession--listing-5f6608705652c3e0ad284002) — Sun, Nov 1 · 3:00 PM – 9:00 PM · Ontario Museum of History & Art and Jack R. Mercer Community Bandstand (Euclid Bandstand) · All ages · Free · checked Oct 20. The City of Ontario's free Día de los Muertos celebration on Sunday, November 1, which moves through downtown in two parts. From 3 to 6 pm the Ontario Museum of History & Art…
- [Kite Day at Cucamonga-Guasti Regional Park](https://grassyknees.com/riverside/activities/kite-day-at-cucamonga-guasti-regional-park--listing-945dcd1f2cf1add0bf7fe51b) — Sat, Nov 7 · 10:00 AM – 1:00 PM · Cucamonga-Guasti Regional Park, Ontario · All ages · Free · checked Oct 24. San Bernardino County Regional Parks and the office of Second District Supervisor Jesse Armendarez host a free Kite Day at Cucamonga-Guasti Regional Park on Saturday morning…
- [Holiday Family Movie Night: Shrek (Ontario Fall Movie Nights)](https://grassyknees.com/riverside/activities/holiday-family-movie-night-shrek-ontario-fall-movie-nights--listing-7854579360731fc74db6e29b) — Fri, Nov 13 · 6:00 PM · Ontario Motor Speedway park · All ages · Free · checked Oct 20. The last of the City of Ontario's free Fall Movie Nights, a Holiday Family Movie Night showing Shrek outdoors at Ontario Motor Speedway park on North Center Avenue. The event…
- [Ontario Holiday Tree Lighting Ceremony](https://grassyknees.com/riverside/activities/ontario-holiday-tree-lighting-ceremony--listing-03e3b89902a6412757b726bd) — Thu, Dec 3 · 5:00 PM – 8:00 PM · Ontario Town Square · All ages · Free · checked Oct 13. City of Ontario's Holiday Tree Lighting Ceremony on December 3, 2026 from 5:00 PM to 8:00 PM at Ontario Town Square, 224 North Euclid Avenue. The event page lists cookie…
- [Ontario Holiday Light Parade on Euclid Avenue](https://grassyknees.com/riverside/activities/ontario-holiday-light-parade-on-euclid-avenue--listing-ef1dea7ac85d482ef2f7fc1a) — Sat, Dec 5 · 6:30 PM – 8:00 PM · Euclid Avenue parade route (Fourth Street to B Street), Ontario · All ages · Free · checked Oct 13. City of Ontario's Holiday Light Parade on December 5, 2026 from 6:30 PM to 8:00 PM along Euclid Avenue, from Fourth Street to B Street. The event page says the parade is followed…
- [Ontario 5K Reindeer Run & Rudolph's Dash](https://grassyknees.com/riverside/activities/ontario-5k-reindeer-run-and-rudolph-s-dash--listing-0f209b2aa84da351e5b0b500) — Sat, Dec 12 · 7:00 AM – 12:00 PM · Euclid Ave. and C St., downtown Ontario · All ages · Free · checked Oct 16. The City of Ontario's annual 5K Reindeer Run & Rudolph's Dash starts and finishes near Euclid Avenue and C Street in downtown Ontario on Saturday, December 12, 2026, with the…

## Places and ongoing programs

- [Cucamonga-Guasti Regional Park](https://grassyknees.com/riverside/activities/cucamonga-guasti-regional-park--listing-2dfed16378720992ac44c58d) — Daily 7:30 a.m. to 6:30 p.m. (fall hours beginning Saturday, Oct. 3) · Cucamonga-Guasti Regional Park, Ontario · From $3 · checked Oct 13. A San Bernardino County regional park on North Archibald Avenue in Ontario with lake fishing, picnic areas and a splash pad (listed as open in the county notice). The park is…
- [Ontario Museum of History & Art](https://grassyknees.com/riverside/activities/ontario-museum-of-history-and-art--listing-72cc1c164103e7a26bc91ad7) — Thursday – Friday, 12 PM – 4 PM; Saturday – Sunday, 11 AM – 5 PM · Ontario Museum of History & Art · Free · checked Oct 13. City of Ontario museum in the 1937 former City Hall on Euclid Avenue, with changing history and art exhibitions and community programs. Admission to the Museum, its programs, and…

## Recently ended

- [Tiny Trick-or-Treaters Play Lab](https://grassyknees.com/riverside/activities/tiny-trick-or-treaters-play-lab--listing-27b2ce05a882f09d0108f2a0) — ended Thu, Oct 22
- [Frankenstein's Laboratory](https://grassyknees.com/riverside/activities/frankenstein-s-laboratory--listing-b35f7e57e31835bc77fd52dd) — ended Wed, Oct 21
- [Ontario Arts Festival (Chaffey Community Museum of Art & City of Ontario)](https://grassyknees.com/riverside/activities/ontario-arts-festival-chaffey-community-museum-of-art-and-city-of-onta--listing-3f9a3e00b12b870fbf578d1f) — ended Sat, Oct 17

## Nearby

- [Things to do with kids in San Bernardino County, CA](https://grassyknees.com/riverside/counties/san-bernardino-county-ca) (Markdown: https://grassyknees.com/riverside/counties/san-bernardino-county-ca.md)
- Other towns in San Bernardino County, CA: [Redlands, CA](https://grassyknees.com/riverside/towns/redlands-ca) (Markdown: https://grassyknees.com/riverside/towns/redlands-ca.md), [Rancho Cucamonga, CA](https://grassyknees.com/riverside/towns/rancho-cucamonga-ca) (Markdown: https://grassyknees.com/riverside/towns/rancho-cucamonga-ca.md), [Chino, CA](https://grassyknees.com/riverside/towns/chino-ca) (Markdown: https://grassyknees.com/riverside/towns/chino-ca.md), [Mentone, CA](https://grassyknees.com/riverside/towns/mentone-ca) (Markdown: https://grassyknees.com/riverside/towns/mentone-ca.md), [Chino Hills, CA](https://grassyknees.com/riverside/towns/chino-hills-ca) (Markdown: https://grassyknees.com/riverside/towns/chino-hills-ca.md), [Fontana, CA](https://grassyknees.com/riverside/towns/fontana-ca) (Markdown: https://grassyknees.com/riverside/towns/fontana-ca.md), [Hesperia, CA](https://grassyknees.com/riverside/towns/hesperia-ca) (Markdown: https://grassyknees.com/riverside/towns/hesperia-ca.md), [Big Bear Lake, CA](https://grassyknees.com/riverside/towns/big-bear-lake-ca) (Markdown: https://grassyknees.com/riverside/towns/big-bear-lake-ca.md), [Apple Valley, CA](https://grassyknees.com/riverside/towns/apple-valley-ca) (Markdown: https://grassyknees.com/riverside/towns/apple-valley-ca.md), [Highland, CA](https://grassyknees.com/riverside/towns/highland-ca) (Markdown: https://grassyknees.com/riverside/towns/highland-ca.md), [Morongo Valley, CA](https://grassyknees.com/riverside/towns/morongo-valley-ca) (Markdown: https://grassyknees.com/riverside/towns/morongo-valley-ca.md), [Phelan, CA](https://grassyknees.com/riverside/towns/phelan-ca) (Markdown: https://grassyknees.com/riverside/towns/phelan-ca.md), [Yucaipa, CA](https://grassyknees.com/riverside/towns/yucaipa-ca) (Markdown: https://grassyknees.com/riverside/towns/yucaipa-ca.md), [Barstow, CA](https://grassyknees.com/riverside/towns/barstow-ca) (Markdown: https://grassyknees.com/riverside/towns/barstow-ca.md), [Rialto, CA](https://grassyknees.com/riverside/towns/rialto-ca) (Markdown: https://grassyknees.com/riverside/towns/rialto-ca.md), [Yucca Valley, CA](https://grassyknees.com/riverside/towns/yucca-valley-ca) (Markdown: https://grassyknees.com/riverside/towns/yucca-valley-ca.md), [Grand Terrace, CA](https://grassyknees.com/riverside/towns/grand-terrace-ca) (Markdown: https://grassyknees.com/riverside/towns/grand-terrace-ca.md), [Loma Linda, CA](https://grassyknees.com/riverside/towns/loma-linda-ca) (Markdown: https://grassyknees.com/riverside/towns/loma-linda-ca.md), [Muscoy, CA](https://grassyknees.com/riverside/towns/muscoy-ca) (Markdown: https://grassyknees.com/riverside/towns/muscoy-ca.md), [Running Springs, CA](https://grassyknees.com/riverside/towns/running-springs-ca) (Markdown: https://grassyknees.com/riverside/towns/running-springs-ca.md), [Twentynine Palms, CA](https://grassyknees.com/riverside/towns/twentynine-palms-ca) (Markdown: https://grassyknees.com/riverside/towns/twentynine-palms-ca.md), [Joshua Tree, CA](https://grassyknees.com/riverside/towns/joshua-tree-ca) (Markdown: https://grassyknees.com/riverside/towns/joshua-tree-ca.md), [Crestline, CA](https://grassyknees.com/riverside/towns/crestline-ca) (Markdown: https://grassyknees.com/riverside/towns/crestline-ca.md), [Victorville, CA](https://grassyknees.com/riverside/towns/victorville-ca) (Markdown: https://grassyknees.com/riverside/towns/victorville-ca.md), [Adelanto, CA](https://grassyknees.com/riverside/towns/adelanto-ca) (Markdown: https://grassyknees.com/riverside/towns/adelanto-ca.md), [Lucerne Valley, CA](https://grassyknees.com/riverside/towns/lucerne-valley-ca) (Markdown: https://grassyknees.com/riverside/towns/lucerne-valley-ca.md), [Needles, CA](https://grassyknees.com/riverside/towns/needles-ca) (Markdown: https://grassyknees.com/riverside/towns/needles-ca.md), [San Bernardino, CA](https://grassyknees.com/riverside/towns/san-bernardino-ca) (Markdown: https://grassyknees.com/riverside/towns/san-bernardino-ca.md), [Trona, CA](https://grassyknees.com/riverside/towns/trona-ca) (Markdown: https://grassyknees.com/riverside/towns/trona-ca.md), [Upland, CA](https://grassyknees.com/riverside/towns/upland-ca) (Markdown: https://grassyknees.com/riverside/towns/upland-ca.md), [Montclair, CA](https://grassyknees.com/riverside/towns/montclair-ca) (Markdown: https://grassyknees.com/riverside/towns/montclair-ca.md), [Skyforest, CA](https://grassyknees.com/riverside/towns/skyforest-ca) (Markdown: https://grassyknees.com/riverside/towns/skyforest-ca.md), [Yermo, CA](https://grassyknees.com/riverside/towns/yermo-ca) (Markdown: https://grassyknees.com/riverside/towns/yermo-ca.md)
- [Things to do with kids in Riverside](https://grassyknees.com/riverside) (Markdown: https://grassyknees.com/riverside.md)
- [This weekend in Riverside](https://grassyknees.com/riverside/this-weekend) (Markdown: https://grassyknees.com/riverside/this-weekend.md)

Town pages are listed once a town has 3 current listings, county pages at 10.