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Fontana, Wisconsin| 269 Fontana Blvd, Fontana, Wisconsin 53125
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Yerkes Observatory at Fontana
Yerkes Observatory
373 W Geneva Street, Williams Bay, Wisconsin, 53191 | 262-245-5555
Visit Website | Category: Activities
About us
Before you go
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Lake Geneva Yerkes Observatory

Managed by the University of Chicago Department of Astronomy and Astrophysics, Yerkes Observatory has been in operation since 1897, with the primary mission of observing and measuring stellar motion through a variety of telescopes, including a 40-inch refractor. The Observatory is located on 77 acres of parkland, a perfect setting for a picnic in warm weather. If visiting during the winter, know that the temperature inside is about the same as that outside and dress appropriately.


Prices -

Saturday tours are free ($8 per person suggested donation). Weekday tours are $10 for adults and $8 for children ages 6-17.

Hours -

Saturdays tours start at 10am, 11am and noon. Weekday tour times vary. The complete tour schedule is listed on their website: http://astro.uchicago.edu/yerkes/index.html


  • Evening observing sessions
  • Free Saturday tours
  • Wedding ceremonies & corporate events


  • Quester Museum
  • Time & space exhibits
  • Guided observatory tours
  • Gift shop


  • Is parking available at the Observatory?

    Yes, there is parking in front of Yerkes Observatory, at 373 West Geneva Street.
  • Are visitors able to use the telescope?

    On select nights, visitors ages 10 and up are able to observe the sky with the 24-inch diameter reflecting telescope. Admission is $30 per person and advance reservations are recommended.

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Driving Direction to Yerkes Observatory
or The Abbey Resort
Distance from attraction: 1.91 miles
Why Stay at The Abbey Resort?
  • Indoor & Outdoor pools
  • Fitness center
  • Full service day spa
  • Restaurant & lounge
  • Children's programming
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