Drop-in Visits


September 1, 2022: The LIGO Exploration Center (LExC) is now open and welcoming drop-in visitors!

Visitors to LHO can now explore the many interactive and static exhibits housed in our new LIGO Exploration Center (LExC). LExC is the new home for the historic Weber Bar (one of the earliest devices designed to detect gravitational waves) and a full-scale engineering model of LIGO's quad suspension, a feat of engineering critical to LIGO's success.

Please note that all drop-in visitors must adhere to the following guideline(s):

  • All LHO visitors over the age of 18 will be required to show proof of COVID-19 vaccination (physical card or photo of card). We define "fully vaccinated" as at least two shots of Pfizer or Moderna vaccine, OR one shot of Johnson & Johnson.
  • Visitors will be expected to follow LIGO's policy on masking as it stands on the day you decide to stop by. Bring a mask just in case it is required on the day of your visit.

For current directions to LIGO Hanford Observatory, please see "Driving Directions"

LExC drop-in hours (excluding holidays):

  • Sunday: CLOSED 
  • Monday: CLOSED
  • Tuesday: 9:30am - 4pm
  • Wednesday: 9:30am - 4pm
  • Thursday: 9:30am - 4pm
  • Friday: 9:30am - 4pm
  • Saturday: CLOSED