Yep, no a/c, but, we just went there from June 22-25 & no a/c was not a problem. There is a fan in the room. I would stay there again. We opened the windows at night.
Cabins don't have A/C, but fans and windows do open. At almost 7000 ft. elevation, it's a bit cooler at night, and keep in mind right now, due to social distancing, availability is cut to about 50%.
I was there the same dates as Barbara in a cabin (funny!) No ac but it cools off at night and the fan helps. Would definitely stay again!
Depends on where you are staying. I believe the cabin style rooms at the Bright Angel have AC since they remodeled last year. The rooms with the shared bathrooms have no AC.
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