The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.

Event Calendar

Fossils: Frozen in Time

Event Information

Date: Saturday, 02/05/2022

Time: 1:30 PM to 3:00 PM

Fee: Free!

Age: Ages 5 or older.

Contact Phone: 815.722.9470

Location: Four Rivers Environmental Education Center

View on Google Maps

Photo courtesy of Barb Ferry

Event Details

Please note: To participate in Forest Preserve programs, the public must follow current masking protocol. For up-to-date mask requirements, click here.

Fossils are evidence of ancient life, and you can make your own fossil replica before hiking the preserve, learning about Illinois’ past and different types of fossils and how they form. Afterward, head indoors to view a collection of fossils that have been found locally. Any fossil replicas made before the hike will be set and ready to take home at the end of program.

Event Requirements

Registration required by Friday, February 4: 815.722.9470.


Please dress for the weather and use caution while walking outdoors as snow and ice may be present on the paths and in parking lots. Four Rivers Environmental Education Center is an accessible facility.

The hike will be 0.5 miles to 1 mile long on paved and natural terrain across uneven surfaces. Anyone who requires an auxiliary aid or service to participate in this program should submit a request online no later than 48 hours before the program.

Sign up for a Newsletter