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a group celebrates an adult birthday party at k1 speed in san antonio

A Fun Party Venue for Adults in Ontario, CA

Need a fun and exciting place in the Ontario – Fontana – Rancho Cucamonga area for your adult birthday party, bachelor party, retirement party, or other special occasion? For nearly 20 years, adults across the country have loved having their party or event at K1 Speed thanks to its adrenaline-pumping racing experience. In addition to racing, enjoy our private party rooms and available food & beverage options for your party!


Read on to learn more about the amazing adult parties at K1 Speed Ontario!


Need to book a kid’s birthday party in Ontario – Fontana?

We’re also the best place in Fontana – Ontario for teen birthday parties!

Adult Event Packages Available For 8 or More Racers

To speak with an Event Specialist please call 1-855-517-7333.

Ontario / Fontana Party Packages for Adults

Adult Mini Grand Prix Package

two adult racing go karts during a party



2 Indoor Go Kart Races

12-Lap Qualifying Race
14-Lap Final Event Race

Reserved Seating for 1 Hr

For Post-Race Meal & Celebrations!


Plenty of Food & Beverages for Your Group

Medals for the Top 3

Plus Podium Ceremony!



per person
$75 – FRI, SAT, SUN

Adult Grand Prix Package

three adults go kart racing at k1 speed



3 Indoor Go Kart Races

12-Lap Practice Race

12-Lap Qualifying Race
14-Lap Final Event Race

Reserved Seating for 1 Hr

For Post-Race Meal & Celebrations!


Plenty of Food & Beverages for Your Group

Trophies for the Top 3

Plus Podium Ceremony!



per person
$90 – FRI, SAT, SUN

Book Your Party for Adults Today!

Included Party Perks

Reserved Race Times

People don’t like to wait, neither should your guests. Our reserved times ensure you race when you want toThis is exclusive to our events.

The Ultimate Photo-Op

From racing action shots to silly podium celebrations, there’s plenty of social media photo gold waiting for you at K1 Speed.

Fun Digital Party Invitations

Every party includes fun digital party invitations (we call them e-vites) that you can email or print out for your guests. These exciting invitations are sure to create a buzz for your party and will leave your guests counting down the days till race day!

Professional Format

Your guests experience a simulation of what professional racers experience. This means they’ll qualify, line up on the starting grid, and RACE.

Podium Celebrations and Cool Giveaways

There’s no worthless “participation” award here. Instead, your guests will have to earn their medal or trophy by finishing in the top three. And when they do, they’ll be rightly celebrated on our podium.

Private Racing

Who wants to race with strangers? Instead, you’ll race with only the people you know.

Reserved Seating For 1 Hr

You’re going to want your own area where you can enjoy your food, socialize with your group, and celebrate any special occasion you’re here for. That’s why we include an hour of reserved seating with your group event. Depending on availability, this may be in one of our private rooms, or a reserved space for your group.

Catering Included

Delicious food? Yeah, we’ve got that too. From pizza, wings, and nachos for adult birthdays and bachelor parties, to full-service catering for larger events such as retirement parties and anniversaries – we’ve got it all for your big party. And with our packages, we’ll provide you with enough food to get started. But you can always add more to your event! Browse our menus below.

*Per caterer, full service menu only available for groups of 10 or more. 

Paddock Lounge MenuFull-Service Catering
image of a k1 speed go kart parked on the track

What Adults Say About Events at K1 Speed Ontario

“This location and the experience was phenomenal. I’ve never done anything like this and we did their grand prix package as it was a bachelor party weekend (exotic cars and go kart racing, lots of fun). First, we had three very experienced drivers in our group and I was not one of them. I’ve never even been in a kart of any sort. From my inexperience to current dirt track racing and kart racing drivers we all felt there was zero we’d change and we thought all of the employees were great. Also, of the group, four have been in other street kart indoor racing facilities and they all said this was the best track and the most fun they’d had. Well done k1.”
– Joe T. | 5-stars

“Took my boyfriend here for his birthday, he always has a need for speed and this place was perfect. He couldn’t stop smiling! Pricing was fair, facility is clean and the workers were very helpful. We loved it!”
– Stephanie O. | 5-stars

“I brought a group to K1 Speed for my bachelor party. To say the least we had an absolute blast! The carts go up to 40 MPH which may not sound fast, but when you are flying around those turns there is no way you can floor it. We did a time trial where they compare your own lap times to themselves. After that we did a position round where you truly “place” in 1st, 2nd etc. our group is still raving about how fun it was and we are planning our next trip. I recommend bringing a group of 10 or more so you can have your own track without any walk ins racing against you. I also loved the fact that they give you exact race metrics when you finish each race, and hey getting that 1st place medal around my next and getting my podium picture didn’t hurt either!”
– Andrew B. | 5-stars

Why We’re the Best Venue in Ontario, CA For Adult Birthday Parties & Events


Here are just some of the reasons that K1 Speed has become the best party place for grown-ups in the Ontario – Fontana – Rancho Cucamonga area:


The Easiest Party to Plan

For most people, planning a successful birthday party or event can be challenging. But at K1 Speed, we’ve made sure our party planning process is the easiest you’ve ever experienced. Let our friendly event planners do the hard work for you so you can just relax and look forward to the event.


We Clean Up So You Don’t Have To

Birthday parties are always fun until it ends and you’re left with a mound of trash to pick up. But you don’t have to worry about that here. We’ll clean up and take out the trash for you so you can get on with the rest of your day or evening.


Conveniently Located in Ontario, San Bernardino County

This exciting K1 Speed location is located in Ontario directly off the 10 freeway where the 10 and 15 intersect. This means we are near Fontana, Rancho Cucamonga, Rialto, San Bernardino, Upland, Jarupa Valley, Pomona, and Diamond Bar. So no matter where your invitees live in San Bernardino County, we’re not far away!

5350 Ontario Mills Pkwy. Bldg E,
Ontario, CA 91764

Adult Party Reservations

Please Note:
Adult Event Reservations require a minimum
of 8 racers.

Book Your Party for Adults Today!


Height Requirements

Adult minimum height requirement is 58″ (147.3 cm).

IMPORTANT: Meeting the height requirement is not a guarantee you’ll be able to race our karts. Drivers will be measured at the location and must be able to safely operate all elements of the kart. Final approval will be at management’s discretion.