Yerkes Observatory Open House: Celebrating Arbor & Earth Day
- Presented By:
- Yerkes Observatory
- Dates:
- April 25, 2026
- Location:
- Yerkes Observatory
- Address:
- 373 W. Geneva Street, Williams Bay, WI 53191
- Time:
- 5:00 PM to 7:00 PM
- Price:
- $5 per child | $10 for adults
- Email:
- info@yerkesobservatory.org
-
Details
Join us at Yerkes Observatory for an Open House! We'll have telescopes on the South Lawn, presentations, food, and educational activities for you and your family. Each event has a unique theme and activities, making it a exciting, exploratory experience each time! April's theme is Earth Day!
- The open house will take place rain or shine.
- This does not include use of telescopes within the building.
- Reservations are required.
- Tickets for this event cost $5 per child and $10 for adults and are available online only.
The main change is related to parking: instead of trolleys transporting guests to and from Williams Bay School, guests will park on-site at the observatory. This also means fewer tickets will be available for each open house, though we are planning to host several more open houses throughout 2026.