The Bottomless Burger Passes will be available for purchase at RedRobin.com/National-Burger-Month starting April 17 at 9 a.m. MT. Guests who purchase this limited-time offer will receive an exclusive black-and-gold card in the mail for redemption from May 1-31, 2025. Red Robin's Bottomless Burger Pass is redeemable for one gourmet burger of guests' choice served with a bottomless side each day of the month of May. Substitutions, additions or premium sides may result in an additional charge*. Sizzling Summer ...