Annual Show

A Cherished MMC Tradition

It is with great sadness that we share this news. 

The MMC 2020 October rock Show at the Cottage Grove Armory has been cancelled.

This was a difficult decision to make. The Club was founded in December 1945 and has put on an annual show every year since 1946. This is a cherished MMC tradition.  

Our Show planning committee was tasked with studying options and alternatives and forwarding their recommendation to the Board of Directors. The committee voted to cancel the Show. The Board accepted the recommendation and voted unanimously to cancel. The most important factor in this decision was protecting the health of all our members, their family and friends, all the vendors, as well as the general public.

We are planning to be back stronger than ever during the third weekend in October 2021. Mark your calendars!


National Guard Training & Community Center
8180 Belden Blvd, Cottage Grove, MN, 55016


The Annual Show is held each year during the third weekend in October.


 $1 per Child
$2 per Adult
$5 for the entire family


Kids Corner

Lots of great earth science activities for kids!

Rock Identification

Bring in your favorite unknown rock or mineral and let us help you to identify it!

Many Items for Sale

Agates – Rocks – Gems – Minerals – Fossils – Jewelry – Beads – Lapidary

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