Our dining service has been modified at this outlet due to workforce shortages. Please find the latest information here.
Opens: May 20, 2022
Closes: November 27, 2022
*Opening and closing dates are subject to change based on future conditions and public health guidance.
December 15, 2022 through March 6, 2023
No reservations are accepted in summer (first come, first seated). Dinner reservations are required in winter and can be made up to 60 days in advance.
Dress code is casual.
Serving breakfast, lunch and dinner. For the current menu, please visit the restaurant.
In August 2011, the Mammoth Hotel Dining Room became certified by the Green Restaurant Association. The GRA is a national non-profit organization that provides a cost-effective way for restaurants to demonstrate their commitment to environmental sustainability. The Mammoth Dining Room is Xanterra’s first certified green restaurant, and with a 4-Star rating (out of a possible 4-Stars), is the FIRST 4-Star certified restaurant in Wyoming and our National Park System, and one of only 25 in the country. To achieve certification, restaurants must address critical areas that include: Energy, Food, Water, Waste, Disposables, Chemicals and Pollution Reduction, and Furnishings and Building Materials. To achieve its 4-Star certification, the Dining Room demonstrated sustainable operations through a major restroom remodel, installation of energy-saving LED lamps and water-saving fixtures, sourcing of local and organic cuisine, recycling and composting restaurant waste, and using environmentally-preferable cleaning products.