Mastodon 5K Trail Run and STEAM Nature Walk 5/21/17!

Join the Mastodon Fair for the 1st ever Trial Run in Jefferson County, MO! Ages 6 and up. This is a 5K chip timed race. Prize for the fastest runner. Uneven terrain so unfortunately no strollers or wheelchairs permitted on the trail. Ticket price includes tshirt if ticket purchased prior to May 5, 2017.

We also have a Kids STEAM Nature Walk for kids ages grades K-12! Kids will be given a passport and travel to different booths to experience art and science activities about nature. Those that complete their passport will win a prize. Ticket price includes tshirt if ticket purchased prior to May 5, 2017.

More information at our facebook page.  Tickets available at

Date: Sunday, May 21, 2017
Mastodon State Historic Site
1916 Seckman Road.
Imperial, MO 63052

Mastodon Fair Awards Ceremony April 1, 2017

Please join us Saturday April 1, 2017 from 6-8pm at the Jefferson College Field House to congratulate the students and teachers who participated in this year’s Mastodon Fair art and science competitions!  All students who entered a project are invited to participate in the opening ceremony parade and receive an event medallion.  The top prizes and awards will be presented during the ceremony. Click on the link below for a list of prize winners.

2017 Grand Awards Ceremony Prize Winners

Note:  The gold, silver, bronze, and honorable mention medallions and ribbons will not be presented during the ceremony.  These medallions and ribbons will be available for pickup after the ceremony has concluded.  If the exhibit was entered by the teacher, then the teacher should pick up their students’ medallions/ribbons to deliver to their students at school.  If the exhibit was entered by the parent/guardian, then the parent/guardian should pick up their child’s medallion/ribbon.

If you are unable to attend the Awards Ceremony to pick up your prizes, medallions, ribbons, etc, then please contact the Mastodon Fair in order to schedule a different pickup date and time.

Volunteers Needed!

Mastodon Fair needs your help!  Volunteers are needed every day from Sunday March 12 through Saturday March 18.  We need help with everything from setup, exhibit check-in, data entry, decorations, hospitality, and tear down.  If you have any time that week that you would like to help you can signup for a volunteer shift on our Eventbrite Volunteer page.  Or just show up at the Jefferson College Field House that week and we will definitely have something you can help with.  Thank you!

Mastodon Fair Endowment Fundraiser Wine Sale
Mastodon Fair GuideStar Profile