"Fort Collins' Old Town margarita institution since 1986, famous for a three-drink limit and flame-grilled fajitas — go for a birthday."
Rio Grande opened on West Mountain Avenue in Old Town Fort Collins in 1986 and has become a regional institution, marking its 38th year in 2024. It was started by Pat McGaughran with twin brothers Andre and Stephen Mouton, and grew into five Colorado locations from this original room. The draw is Tex-Mex with energy: marinated fajitas off the flame and margaritas with a famous house limit. See our Fort Collins dining guide for the rest of Old Town.
The kitchen built its name on a few things done the same way for decades: house-made tortillas, slow-cooked black beans, and grilled, marinated fajitas that arrive sizzling. The other signature is at the bar, the Classic Rio Margarita, the tequila-salt-lime mix that founder Pat McGaughran says Northern Colorado turned out to be very thirsty for, served with a well-known three-margarita limit. Mains sit mostly between about $12 and $22. For more across the style, read our guide to the best Mexican restaurants worldwide and our field guide to a great restaurant.
The Old Town room is loud, busy and built for a good time rather than a quiet dinner. Tables turn quickly, the bar is the center of gravity, and weekend nights run at a happy roar. Lighting is bright-casual, seating is a mix of booths and tables, and there is no dress code. It is a place for fajitas, a margarita and a group, not a hushed two-top.
Book Rio Grande for a birthday because it is loud in the right way: sizzling fajitas to share, the famous margaritas with their three-drink limit, and a room that is already in a good mood on a weekend. Old Town puts the bars and patios a short walk away for afterwards. Order fajitas for the table and start with the Classic Rio Margarita. See more birthday restaurants.
Not for a quiet or romantic dinner. The Old Town room runs loud and fast, especially on weekends, and the famous three-margarita limit is a hint at the energy of the place.
Yes, for what it is: a Fort Collins institution since 1986 known for fajitas and margaritas rather than fine dining. The house-made tortillas, slow-cooked black beans and flame-grilled fajitas are consistent, and the Classic Rio Margarita is the reason many people walk in. Prices are fair, mostly $12 to $22, and the Old Town room is built for a group.
Rio Grande caps guests at three of its Classic Rio Margaritas, a house rule the restaurant is well known for across Northern Colorado. The margaritas are strong, and the limit is part of the legend rather than a marketing line. Order one to start, share fajitas, and you will understand why the cap exists by the second.
Mostly no, it runs as a walk-in, and a weekend wait at the Old Town location is part of the experience. Put your name in, wait at the bar with a margarita, and tables turn fairly quickly. Larger groups for a birthday should call ahead to ask about seating. See our Fort Collins guide for nearby options if the wait is long.
Yes. The room is loud and celebratory, the fajitas are made to share, and the margaritas set the tone fast. Old Town's bars are a short walk for afterwards. Bring a group, order fajitas for the table and start with the Classic Rio Margarita. For more celebration rooms, see our birthday guide.
Rio Grande is walk-in. Expect a weekend wait at the bar; large birthday groups should call the Old Town location ahead.
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Rio Grande is our case study in doing a handful of things the same reliable way for decades.
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