I really do not know. Guessing, it might be so long as it is not snowed over... And just reading another's answer, no, closed last week. Sorry, I'm in Helena, haven't been there since the 1st of September.
No, it was closed last week when we went
Red Sleep Drive, which goes up and over Red Sleep Mountain, is closed from October to May and opens Mother’s Day weekend. During the winter, Prairie Drive and the Western Loop are still open to visitors. For more information, please contact our Visitors Center.
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