Overview
Observatory:
From spring through fall, the Witte Observatory near the park's entrance hosts public viewings the first and third Fridays of every month. The Observatory is operated by the Southeast Iowa Astronomy Club through a cooperative agreement with Des Moines County Conservation.
Model Airplane Field:
The Burlington Model Airplane Club maintains the Polson Flying Field at Big Hollow for use by radio controlled airplane enthusiasts who are members of the Academy of Model Aeronautics. Find out more by visiting the club's website.
Shooting
Big Hollow Recreation Area is home to a 25, 50, 100, and 300 meter outdoor shooting range. Each of the ranges have a ten person covered firing line with wood and concrete benches. Membership is required to use the range and may be obtained by simply attending a short safety course offered several times throughout the year by DMCC staff.
During the summer, the Flint River Bowhunters Club maintains a 3-D Archery course just outside the shooting range. Public shoots are hosted there once a month. Visit their website for more information.