Clicky

In-N-Out Burger

In-N-Out Burger In-N-Out Burger is a classic fast food restaurant located on Mountain. This burger joint has been serving up fresh, juicy 100% beef patties on freshly baked buns since 1948. Their hand-cut fries and real ice cream shakes are the perfect accompaniment to the star of the show - their burgers! Both lunch and dinner are served, making it a great spot for any time of day.
(601)

Recent social media posts

06/22/2026

Summer is officially here! Whether you’re chasing longer days, golden sunsets, or late-night fun, we’re here to serve you quality burgers made with the freshest ingredients all summer long!

Our 2026 T-shirt is now available in white! Shop now at shop.in-n-out.com.
06/15/2026

Our 2026 T-shirt is now available in white! Shop now at shop.in-n-out.com.

Golden hour hits different at In-N-Out®! ☀️
06/14/2026

Golden hour hits different at In-N-Out®! ☀️

We’re excited to welcome you to our newest location at the BLVD on the Las Vegas Strip! This restaurant features special...
06/09/2026

We’re excited to welcome you to our newest location at the BLVD on the Las Vegas Strip! This restaurant features special design touches and an on-site In-N-Out Burger® Company Store for a unique experience. We look forward to serving you our classic menu of quality burgers, fries, and drinks.

Fresh fries and summer vibes.
06/07/2026

Fresh fries and summer vibes.

05/28/2026

At In-N-Out®, we serve only fresh, never frozen, high‑quality ingredients. Every burger is made one at a time, fresh to order. Celebrate National Hamburger Day with a classic!

05/28/2026

During this time of remembrance and gratitude, we are honored to bless 10 families of fallen heroes who shared their courageous stories on our tribute wall with 365 days of In-N-Out Burger® by offering them 365 complimentary meal cards. Blessing these families is a small but sincere gesture for the ultimate sacrifice our fallen heroes made in serving our country.

Visit INOsalutes.com to show gratitude to our fallen heroes by reading their stories on our tribute wall.

05/25/2026

Today and every day, we honor those who gave the ultimate sacrifice in service to our country.

Visit INOsalutes.com to share your gratitude and read the courageous stories on our tribute wall.

05/18/2026

Show gratitude to our fallen heroes and share their courageous stories on our tribute wall. With Memorial Day approaching, we would be honored to bless a family of a fallen hero during this time of remembrance and gratitude, with 365 days of In-N-Out Burger® by offering them 365 complimentary meal cards. Each tribute submitted will be respectfully entered for a chance to receive this special opportunity; a small but sincere gesture for the ultimate sacrifice our fallen heroes made serving our country. For more details, visit INOsalutes.com.

NO PURCHASE NECESSARY VOID WHERE PROHIBITED. Odds depend on entries received. Ends 5/25/2026 11:59pm PT. Rules: INOsalutes.com

Address

2235 Mountain
Ontario, CA
91761

For those traveling by public transport, take the Metro Gold Line and get off at the Mountain Station. Then, transfer to the Omnitrans bus line and get off at the nearby bus stop.

For those driving, take the I-10 eastbound and exit at South Mountain Avenue. Turn left onto East In-N-Out Burger Boulevard and follow the signs for parking.

Opening Hours

Monday 10:30am - 1am
Tuesday 10:30am - 1am
Wednesday 10:30am - 1am
Thursday 10:30am - 1am
Friday 10:30am - 1:30am
Saturday 10:30am - 1:30am
Sunday 10:30am - 1am

Telephone

+18007861000

Website

Alerts

Be the first to know and let us send you an email when In-N-Out Burger posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category

What people say

Burger restaurants are a staple in the fast food industry, but not all burger joints are created equal. In-N-Out Burger in Mountain, Ontario stands out from the rest with their commitment to quality ingredients and old-fashioned cooking methods.

From the moment you take your first bite of their juicy 100% beef patty burger on a freshly baked bun, you can taste the difference that quality makes. The produce is always crisp and fresh, and their fries are hand-cut from whole potatoes for that perfect crispy texture. And let's not forget about their shakes made from real ice cream - a perfect complement to any meal.

What sets In-N-Out Burger apart is their dedication to doing things the old-fashioned way. They grill each burger to order, ensuring that every customer receives a hot and fresh meal every time. It's no wonder they've been serving up delicious burgers since 1948.

If you're looking for a fast food restaurant that doesn't compromise on quality, In-N-Out Burger in Mountain, Ontario is definitely worth checking out. Their commitment to using only the best ingredients and cooking methods will leave you satisfied and craving more. Quality you can taste® indeed!

Claim ownership or report listing