There is no admission fee, but donations are welcomed. Tour guides offer information on the history of the observatory, astronomical research and space. Tours are intended for families and small groups and reservations are not accepted. For groups of 15 or more, special programs are available, including viewing through the telescope, mini-classes, slide shows and talks. You must contact tour coordinator Richard Dreiser to make advance arrangements.
Payment is due at the time of the program.
It is a good idea for you to confirm at least 24 hours in advance. If you cancel at least 24 hours in advance, we will not charge you. Yerkes Observatory is located at 373 W. Geneva St., in Williams Bay. Turn south onto Hwy 67 and drive about six miles to the intersection of Highway 50. Cross Highway and continue downhill almost exactly one mile.