Drop-in Visitors

Note: The LIGO Hanford Observatory will be closed to drop-in visitors Thursday, January 11th and Friday, January 12th, 2018. Our monthly tour will take place as scheduled on Saturday, January 13th. See the link below for more information.

If you cannot visit LIGO during one of our monthly public tours, you may drop by Monday to Friday between 10:00 a.m. and 4:00 p.m. LIGO is closed to drop-in visitors weekends and holidays. During an un-hosted visit, guests can view a number of posters, exhibits, and hardware displays in LIGO’s visitor area. However, given LIGO's scale and the complexity of what we do, to have the best and most educational experience possible we encourage everyone to plan to visit on a scheduled tour date.

Note: Springtime is field trip season for most schools in the Tri-Cities, and LIGO often hosts large school field-trips during this time. Most school groups are onsite between 10 a.m. and 1 p.m.. If you plan to 'drop in', we advise avoiding a morning visit in the months of March, April, and May.