I have to say that my husband and I were shocked by all the good reviews of this place. I admit that we were there at an off time, but everything about the experience was bad. Bad food, terrible service, mediocre atmosphere and the bathroom looked more suited for a poorly maintained truck stop than an establishment that serves food.
We had an hour to kill before visiting Castello di Amorosa and were hungry after a long morning but several of the restaurants in Calistoga were closed at 3 in the afternoon, so we stumbled upon Hydro. I ordered "the best burger in Calistoga" medium rare. I assume this is the only place in Calistoga that serves burgers because that is the only way this could have been considered the "best". The burger itself was well done and flavorless, there was one sad little piece of bacon on it and the bun was enormous, which completely overwhelmed the already tasteless burger. The garlic fries were okay, relatively thin and crispy but again bland, but by far the best part of the meal.
My husband ordered a plain bacon cheeseburger, rare. Again it was over cooked and there was no bacon or cheddar cheese anywhere on it, instead there was mayo. My husband never complains about food, even if it is barely edible, but he was very disappointed in this place.
Our server was prompt to take our order but the food was slow to come out and when we asked for the check, it was another 20 minutes before we got it. Even the bartender came over to ask if we were ready for the check, we told her that the server was supposedly getting it, and 10 minutes later we finally got it. I've worked in restaurants, I understand being in the weeds, but he wasn't. He had 3 tables and we could see him standing at the bar BSing or flirting or whatever he was doing.
I would never go back to this place. It was a complete waste of time and money. Next time, we'll just go to an In & Out or even McDonalds.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.