St. Louis Astronomical Society

Mastodon Fair

Saturday, March 21, 2026

Event

The St. Louis Astronomical Society and DarkSky Missouri will host a booth at the Mastodon Fair.

The Mastodon Fair is a 501(c)3 non-profit organization that supports students, teachers, parents, and the community in the development of the creative and scientific process to submit creative and novel projects in the annual regional competition held each March at Jefferson College in Hillsboro, MO; along with hosting community events to expand creativity and knowledge.

Date: Saturday, March 21, 2026

Time: noon - 3 p.m. Central

Location: Jefferson College Field House
1000 Viking Dr
Hillsboro, MO 63050

Information for Visitors
Instructions for the Public:

The St. Louis Astronomical Society and DarkSky Missouri will host a booth at the Mastodon Fair.

The Mastodon Fair is a 501(c)3 non-profit organization that supports students, teachers, parents, and the community in the development of the creative and scientific process to submit creative and novel projects in the annual regional competition held each March at Jefferson College in Hillsboro, MO; along with hosting community events to expand creativity and knowledge.

Location Details

Jefferson College Field House
1000 Viking Dr
Hillsboro, MO 63050
(click to get directions)
check weather forecast

UPCOMING EVENTS

Sun 3/15/2026
11 a.m. - 3 p.m. Central 		SLSC Solar Public Telescope Viewing
Fri 3/20/2026
7:30 p.m. - 10 p.m. Central 		SLAS Regular Meeting Room 162 McDonnell Hall, Washington University [Meeting Site]
 Saint Louis, MO
Sat 3/21/2026
7:30 p.m. - 10:30 p.m. Central 		AIM FOR THE STARS at Jefferson College Observatory Jefferson College Observatory
9873 Farm Road Hillsboro, MO
Sat 3/21/2026
- Sat 3/21/2026
noon - 3 p.m. Central 		Mastodon Fair Jefferson College Field House
1000 Viking Dr Hillsboro, MO