Board Thread:Show-Related Questions/@comment-92.25.197.157-20141107232757/@comment-27794543-20170213063525

While there is "Weather Peak" in Montana, the "Mount Weather" that they're talking about in the series is the one located in Virginia. This is confirmed by numerous other clues provided in the series, including the remnants of Washington, DC being within 1-2 days hiking distance (vs. if Mount Weather was in Montana, that would be over 2000 miles i.e. months of hiking).