The full program lasts about two hours and follows a 2-mile paved trail. Participants are welcome to stay with the group or return to the parking lot on their own. Activities include seasonal observations, sensory activities and the telling of the creation of Sodalis Nature Preserve. Hannibal Parks & Recreation nature programs are free but space is limited and reservations are required by calling Hannibal Parks & Recreation at 221-0154 or emailing mlrichards@hannibal-mo.gov.