Summer prairie plants in bloom at Retzer Nature Center on a sunny day

Photo Credit © Retzer Nature Center

Retzer Nature Center

Cancelled due to Covid-19

Training Dates

July 20 - July 25, 2020


Retzer Nature Center

S14W28167 Madison Street

Waukesha, WI 53188



Janet Barthel

Jen Groves

Chris Kavalauskas

Kesha Patel

Julia Robson

Cathy Ward


All 2020 Master Naturalist Volunteer Trainings are postponed due to COVID-19. The Master Naturalist Program continues to work with host organizations to develop a 2021 training calendar, along with new training guidelines and resources to promote healthy and engaging learning environments out in nature and in the classroom. Watch for 2021 locations and dates to be announced by December 1, 2020.

Waukesha County Parks and Friends of Retzer Nature Center are hosting a week-long Master Naturalist Volunteer Training at Retzer Nature Center, a 400 acre county park located in Waukesha. Join us from July 20-25, 2020, for an exploration of the prairies, forests, waters, wildlife, and geology of southeast Wisconsin. The course will include limited classroom time at Retzer Nature Center and local field experiences incorporated into each day of the training.

The Wisconsin Master Naturalist program is a network of well-informed volunteers dedicated to conservation service, leadership, and lifelong learning. The Master Naturalist Volunteer Training provides 40 hours of coursework in natural history, interpretation, and conservation stewardship. Trainings combine classroom instruction with field experiences and are taught by professional natural resources educators and scientists. Once trained, Wisconsin Master Naturalists provide 40 hours of service and take 8 hours of advanced training each year to maintain their certification and receive a recognition pin.


Monday, July 20th: 9:00 am - 5:00 pm

Tuesday, July 21st: 9:00 am - 5:00 pm

Wednesday, July 22nd: 9:00 am - 9:30 pm

* Field experience and classroom instruction from 9 a.m.-5 p.m.; special citizen science field experience from 6-9:30 p.m.

Thursday, July 23rd: 9:00 am - 5:00 pm

Friday, July 24th: 9:00 am - 5:00 pm

Saturday, July 25th: 8:30 am - 1:30 pm

Class Size



To be a certified Master Naturalist, you will be required to:

  • Attend regularly. Only four hours of training may be missed.
  • Participate in field trips, even in inclement weather.
  • Travel in personal vehicles as necessary to reach field trip locations.
  • Experience moderate activity on uneven terrain. Please consult with the program office before registering if you have you have questions about accessibility.
  • Complete a capstone project during the course.

Financial Hardship

The Wisconsin Master Naturalist program believes that finances should not be a barrier to learning. Reduced registration fees are available for those who indicate the fee is a hardship. Reduced fees will be available during the registration process at a self-selected rate of either $200, $150, or $100. Our hope is that by participating in the Master Naturalist program you are able to give back your time to organizations that need your help. And if your financial situation changes in the future that you’ll consider a donation back to our program.

Cancelled due to Covid-19