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
General Information: (262) 896-8007
Environmental Learning Center Hours: 8:00 a.m. - 4:30 p.m. (Mon.-Fri.); 10 a.m. - 3 p.m. (Saturday); Closed (Sunday)
Retzer Nature Center Ground Hours: Sunrise - 10:00 p.m. (Year-Round)

There is no daily entrance fee at Retzer Nature Center