“ Never have an issues when ordering here, good food good customer service! I like that they have multiple options for toppings. ”

“ Grandpas is always a classic big burgers taste like it was from the 80's when I was growing up. Definitely a place to go for a good burger ”

“ Huge burgers, pork tenderloins, French fries and typical fried diner food. Few seats, take it to go ”

“ This place is consistently great. So far, with the new management, it's the same. Employees say management is nice. Please visit often. Everything is made fresh to order. They hire local. This is better than a chain burger joint. Since 1980, it's known for its wide, six-inch burgers -- "#1 on the big bun!" The beer-battered onion rings are delicious. ”

“ Now this is a classic burger joint! Some of the best burgers I've had... definitely come with an appetite because these are huge. If you wanna skip a line and simply grab food come in early, but if you wanna stop by for the experience of an oldies style burger joint come in at night with the rest of us hooligans! ”

“ This place is a legit old school burger joint. Simple menu, very tasty food! Cool drive in sort of vibes. You order your food and then go back to your vehicle and chill until they call you order number over a loud speaker. The person who too my order was very friendly. 10/10 I will go back. I got a single small cheeseburger. Which was very good. Fries and rings were crispy even after traveling 15 minutes taking my food to go. (There is not seating, so gotta eat in your car or head out). The ONLY thing I would do different would be to order a double or triple patty next time. These patties are very thin. So cool this old burger joint has been able to be stay around for so long! Support this small local business when you are near and hungry. ”

“ Amazing burgers, classic old school type of joint. Fries are super crispy and yummy. I've only had the cheeseburgers, regular size and the big size. The big one really is large! I have yet to try the chicken sandwiches or the steakburgers, so we will see! Shakes are A1 ”

“ We've passed this place for 17 years and tonight we finally stopped. Why did it take so long? Afraid of disappointment, shady federal spot, yadayada. Grandpa did NOT DISAPPOINT!!!! We got the double small cheeseburgers and omg tasty, perfect proportions and crispy edges to the patty- delightful surprising! Oh man and the onion rings- do not miss out!! At a point as we were devouring in the car- the hubs and I looked at each other and said we would totally bring Anthony Bourdain here at 1am and make sure to get the double large burger- the smalls were almost too much to Finish and the size of the large is bigger than your face!! Next to try- orange shake and chicken fried steak burger!!! We will be back. ”

“ I have this problem that I'm immediately a fanboy of any business that's...well...been in business for a long time. Grandpa's Burger Haven has been a Denver mainstay since the 1960's. It's an old school burger joint doing it their way or the highway. And who doesn't admire that? Now there are a few rules when you come here. The words "modern" or "contemporary" or "21st century" are nowhere to be found. The burgers are gigantic, roughly the size of a large donut like an apple fritter. They have regular hamburgers or steakburgers, and they're available in different sizes. From the outside looking in, you'll notice this is a burger stand not a sit down restaurant. There is ZERO seating. These burgers are meant to be enjoyed in your car like the drive thrus of yesteryear. You can try to wait until you're home to dive in, but the greasy smell of that brown bag will force you to dive in. I burnt my mouth devouring those onion rings. Man, these were delicious! Crunchy, well seasoned and piping hot. I love a good onion ring and these were damn tasty. I couldn't believe the size of the large cheeseburger. The burger and bun are the size of your face. All burgers come with mustard, lettuce, tomato, onion and pickles. You might like your burgers differently, but I, in fact, love the simplicity of these old school burger flavors. Definitely on #TeamMustard in this house. It's a behemoth to eat. It won't blow your mind, but to me it was properly cooked and dressed. I liked it! For those who love those big, big buns, Grandpa's Burger Haven has you covered. Love it or hate it, they've been in business longer than half of the population has been alive. And to me, you have to respect places that have stood the test of time. ”