Waukesha County

Howl-O-Ween
Friday, October 18
6:00 – 8:30 p.m.
$15 per carload
Recommended for ages 10 and younger
A Halloween-themed evening filled with scare-free entertainment and activities for the whole family! This event features night hikes, campfire, planetarium shows, children’s games and crafts, a DJ dance party, and food & beverages.

The Horwitz-DeRemer Planetarium will offer a special showing of "The Little Star that Could" every 40 minutes from 6:15 pm to 8:30 pm. 

By giving stars personalities, this classic program introduces children to the sun, moon, and planets seen in the day and night sky.

Friends of Retzer Nature Center Members receive FREE entrance into this event. Find out how!


Volunteers are always needed. Contact our Volunteer Coordinator to find out how you or your organization can help!

Environmental Learning Center Hours: 8:00 a.m. - 4:30 p.m.
Retzer Nature Center Ground Hours: Sunrise - 10:00 p.m. (Year-Round)
There is no daily entrance fee at Retzer Nature Center
Park System Office
515 W. Moreland Blvd. Rm AC 230 Waukesha, WI 53188
Business Hours: M-F, 8-4:30 pm (excluding Holidays)
Phone: (262) 548-7801 | Fax: (262) 896-8071
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