Welcome to the MMT Observatory


Latest News

  • Click here for more MMTO news and highlights
  • Mt. Hopkins Road Work - July 26-27

    Mt. Hopkins Road will be closed on July 26 at 8:30am for culvert replacement at km 9.6. The road will reopen on July 27 at 3:00pm. Foot traffic will be able to pass through the site on July 26 after 3:00pm. Power to the mountain will also be de-energized at 8:00am on July 26 and turned back on by the end of the day on July 27. Check back here for updates.

  • Summer Tour Update

    Summer tours are currently on hold due to road work scheduled for the Mt. Hopkins Road. We appreciate your patience while the needed maintenance is taking place. Current plans are to resume the tours in September. Updates will be posted here so check back!

  • Summer Shutdown Schedule

    Summer shutdown begins on Tuesday, July 25. The observatory will reopen on Tuesday, August 22.