Waukesha County


Retzer Nature Center


Updated Sept .17, 2021

Waukesha County and the City of Waukesha have decided to discontinue the Howl-O-Ween event in order to focus on other fabulous autumn activities. We are encouraging the community to participate these family-friendly fall events: 

To find a listing of all fall events available, please visit:

City of Waukesha Events: https://www.waukesha-wi.gov/

Waukesha County Events: https://www.waukeshacounty.gov/events


Retzer Nature Center

S14 W28167 Madison St., Waukesha, WI 53188 (directions)

Environmental Learning Center
M-F 8 am - 4:30 pm • Sat 10 am - 3 pm
Closed Sundays & County-observed Federal holidays

Retzer Nature Center Grounds
365 days Sunrise - 10 pm

Retzer Nature Center grounds open to all • No requirement for Parks annual membership or daily permit

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