Tour Information for General Public

Tours of the office and mountain sites are done by appointment only. To arrange for a tour please use the "General Visitors Link" below. Please note also that Mauna Loa Observatory is not an astronomy observatory. For those interested in astronomy, see

Visiting Scientists

If you are visiting to work at the site, please go to the "Visiting Scientists Link" below.

Directions to MLO sites

If you need directions to the observatory or the Hilo office from around the Big Island, please use the "Get Directions and Maps Link" below.

Preparation Checklist

Everyone should look at the Preparation Checklist before heading up to the observatory.