April: 

4/12 & 4/13 Anoka County Gem & Mineral Club Rock Show, Crystal, MN 

4/19 & 4/20 Elk River Rock 'n Gem Show
                    Furniture & Things Community Event Center
                    1000 School St NE, Elk River, MN

May: 

5/10 & 5/11 Cuyuna Rock & Mineral Club Annual Rock Show, Brainerd, MN

June:

6/13-6/15 The Rock'N Gem & Artisan Show, Milaca, MN

July:

7/19 Hopkins Raspberry Festival, Marketplace Fair, Hopkins, MN

Aug:

TBD

Sep:

9/27 & 9/28 MN Mineral Club Annual Rock, Mineral, & Gem Show, St. Paul, MN 

Oct:

10/25 & 10/26 Anoka County Gem & Mineral Club Rock Show, Crystal, MN 

Previously Attended:

Screamtown

Anoka County Gem & Mineral Show

Rock n' Gem Show

Wright County Swappers Meet

Hopkins Raspberry Festival

MN Mineral Club Annual Show

March Into Spring Craft & Gift Show

Cuyuna Annual Gem & Mineral Show

May Flowers Arts & Crafts Market

1st Annual Shakopee American Legion Spring Classic Car Show

Edina Art Fair

And if you're looking for Rock & Mineral Shows specifically, check out our page on MN & WI Rock Shows and Clubs.