Join us for our next open house on Thursday, July 11 from 7:30pm – 9:30pm! We’ll have observing outside if the weather is clear, family activities, presentations from special guest astronomer and author Dean Regas, ice cream for purchase by Sweet Tooth of Lake Geneva, and more for your family to enjoy. 

The open house will take place rain or shine. This does not include use of telescopes within the building. Reservations are required, and tickets can be purchased on our ticketing website. Tickets for this event cost $5 per child and $10 for adults and are available online only. There will not be parking onsite at the Observatory. Ticket holders must park at Williams Bay School and board an accessible trolley that will run a continuous shuttle between the school and observatory during the Open House. Scroll to see the full schedule of events!

To reserve tickets, click here to go to our ticketing website!