In-N-Out Burger

Name: In-N-Out Burger
Address: 583 Grand Avenue, San Marcos, CA, 92078, US
Telephone: +18007861000
Price range: $
Rating: 4.7

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In-N-Out Burger

In-N-Out Burger is a popular burger and fast food restaurant located on Grand Avenue. Known for their commitment to using only the freshest ingredients, they offer juicy 100% beef patties grilled to order, hand-cut fries, and shakes made with real ice cream. The menu features classic options such as hamburgers and cheeseburgers that are sure to satisfy any burger craving. Whether it's lunch or dinner time, In-N-Out Burger delivers quality you can taste® anytime you visit.
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Recent social media posts

11/08/2026

Falling for a Double-Double® Combo! Featuring a little Rocky Mountain flair from our Colorado T-shirt.

11/05/2026

They’re here! Our exclusive collab between In-N-Out Burger® and VANS shoes is available now only at shop.in-n-out.com. Grab your pair while supplies last!

This shoe provides hope! Your purchase helps further the mission of to provide hope, immediate support, and sustainable solutions for those experiencing homelessness. Net proceeds from this purchase will support HIS EYES®.

11/01/2026

Since its founding last year, HIS EYES® has continued Evan Ellingson’s legacy by bringing hope and support to those in need.

This November, in recognition of National Homelessness Awareness Month, In-N-Out Burger® will match donations 3-to-1, up to $600,000, with 100% of donations supporting organizations that help individuals and families experiencing homelessness.

Donations can be made at any In-N-Out Burger location or online at hiseyesfoundation.org.

As we celebrate one year of HIS EYES, we honor Evan’s legacy of seeing others through God’s eyes and extending compassion and care to those in need.

Together, we can bring hope, change lives, and make a lasting difference in our communities.

10/30/2026

There’s still time to make a difference! As National Substance Abuse Prevention Month nears its end, we invite you to support the fight against substance abuse by donating at any In-N-Out Burger® restaurant or online at slave2nothing.org.

Through the end of October, In-N-Out Burger will match donations to Slave 2 Nothing® 3-to-1, up to $300,000, ensuring that 100% of every dollar raised goes to organizations that assist individuals and their families to gain freedom and healing from substance abuse.

10/27/2026

Happiness is just a shake away. The only question: vanilla, strawberry, or chocolate?

10/22/2026

It’s here! Lynsi Snyder and Terry Crews sit down to talk about the values and vision that continue to guide IN-N-OUT®. Watch the full interview now at in-n-out.com/interview!

10/22/2026

78 years ago today, a small hamburger stand in Baldwin Park, California, was where something truly special began, and it’s because of you that we’re still celebrating today.

From our beginnings in a barely 100-square-foot building to now serving communities across 10 states, our journey has been shaped by meaningful milestones and the incredible loyalty of our Customers. Every new restaurant, every new state, and every generation carries forward our founding values of quality, cleanliness, and friendliness, and they remain at the heart of everything we do.

From our IN-N-OUT Family to yours, thank you for your trust and for allowing us to be part of your lives and communities. We’re incredibly grateful for the opportunity to serve you, yesterday, today, and for many years to come!

Love, Lynsi

10/21/2026

Tune in tomorrow! Lynsi Snyder and Terry Crews answer fun questions and share laughs while reflecting on IN-N-OUT®'s legacy, values, and growth through the years. Watch the full interview tomorrow at in-n-out.com!

10/21/2026

Rock 2 Freedom® Show Update

10/16/2026

Lynsi Snyder and Terry Crews share a conversation about IN-N-OUT®'s legacy, values, and thoughtful growth through the years. The full interview drops on 10/22.

10/15/2026

Just dropped! Check out our two new tees and freshen up your collection at shop.in-n-out.com.

Address

583 Grand Avenue
San Marcos, CA
92078

Travel Directions:
- If you are traveling by public transport, you can take the bus and get off at Grand Avenue Station.
- If you are driving, take Highway 78 and exit at S. Twin Oaks Valley Road. Turn left onto S. Twin Oaks Valley Road, then turn right onto San Marcos Blvd and finally turn left onto Grand Avenue.
- There are several parking options available near the restaurant including a parking lot next to the restaurant or street parking nearby.

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

https://locations.in-n-out.com/185

Alerts

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Chain

In-N-Out Burger

What people say

Burger restaurants are a staple of American cuisine, and In-N-Out Burger on Grand Avenue in San Marcos is no exception. What sets this burger joint apart from the rest is 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, you can taste the difference that fresh, high-quality ingredients make.

In-N-Out Burger has been serving up delicious burgers since 1948, and they haven't strayed from their commitment to quality since then. Their burgers are grilled to order, ensuring that each one is cooked to perfection. The buns are freshly baked, adding an extra layer of flavor to every bite. And let's not forget about the fries - hand-cut from whole potatoes and perfectly crispy.

But it's not just about the food at In-N-Out Burger - it's also about the experience. The staff is friendly and efficient, making sure that your order is exactly how you want it. And if you're in the mood for something sweet, their shakes made with real ice cream are a must-try.

Overall, In-N-Out Burger on Grand Avenue in San Marcos is a top-notch burger restaurant that truly lives up to its motto of "Quality you can taste®." If you're looking for a delicious meal made with fresh ingredients and served with a smile, look no further than In-N-Out Burger.