I have eaten at all four of the Pinnacle Peak restaurants in CA (Colton, San Dimas, Garden Grove, and Santee), as well as two in AZ. The CA restaurants and AZ restaurants are different owners but same style and quality. I have found slight differences in the atmosphere, but the food, service, bar, and price brought me and anyone else I could bring back again and again. They only serve dinner, open at 5pm, and you can watch them cook the food over open flame grills with real mesquite coals.
Anyone that doesn't like the food either doesn't like meat, or wouldn't like a great steak if it bit them.
It is definitely worth the drive. (We try to get there before 6:30 pm). Reservations are not accepted.
Pros: Great food/atmosphere, Lots of food, Great service
Cons: , Could be bigger, Could be closer
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