Well, I know this post is late, but I was in Bishop on beautiful Route 395 just last week and stopped in for dinner at Amigos' on this board's recommendations. I thought I would share for the benefit of the next person planning a stop in Bishop.
Amigos' Restaurant is a perfectly adequate place for dinner after a long drive. It is by no means "authentic" Mexican food. You will not find cochinita pibil or birria or a complicated mole (or any mole for that matter) on the menu. You will not be raving to your friends about the food at Amigos'.
What you do get is safe, solid Americanized Mexican food, with lots of cheese and sour cream and overly salted guacamole on everything. Chips and mild salsa on the table. The restaurant definitely tries hard.
The portions are ridiculously large. I ordered some nachos which were under "appetizer" and was served a mountain of crispy chips buried in beans, cheese, some dry cotija cheese, sour cream, guac, olives, tomatoes, salsa, etc.. It was good bar food quality, very tasty.
By the time my chile verde burrito arrived I could only eat a few bites of this behemoth-sized burrito stuffed with very tender chunks of pork in a mild green sauce, and oozing with cheese (I have a feeling the cooks say "If in doubt, throw cheese at it). The flavors were unremarkable, but perfectly satisfying.
Bishop is a small town in the middle of nowhere, and the prices show they have a captive audience. It wasn't "expensive" but not cheap either, and had the portions not been so massive I might have been bothered by that. As it is, two people could easily have made a meal out of just the nachos.
Finally, Amigos' is a good deal where you can expect friendly and efficient service in a clean and brightly decorated atmosphere, massive portions of enthusiastically made if not remarkable food. And, at the end of a long drive, frankly, it may be the best kind of place to find.
We ended up at BarBQ Bill's on the main drag (187 South Main) a bit more in the local part of Bishop and had an adequate, well-priced "senior" meal. Casual, kind of buffet line service in a homey western decor setting. Food that will fill you up for a good price is about as good as it gets in Bishop.
Here's some of my old notes, maybe someone can provide a little recent info?
Schaat's Bakery - macaroons
In Bishop, shortly after 395 makes a sharp left turn (heading north, north of downtown and north of the junction with US 6), there used to be a small mom-and-pop place run by a Mexican family, on the left side of the road.
Paradise Inn in Paradise (just N of Bishop)
and about 12 miles to the south (but I see autolink places it in Bishop)
Rossi's Steak & Spaghetti
100 North Main St.
Rossi's Steak & Spaghetti Restaurant
100 N Main St, Bishop, CA 93514