Tour Information for General Public

Tours of the Mauna Loa Observatory are performed by appointment only. To arrange for a tour please use the "General Visitors Link" below. Please note that the Mauna Loa Observatory is not an astronomical observatory and those interested in astronomy should visit

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.