Come along on this tour of alien invaders of Prince Gallitzin State Park. Find out about how these non-native organisms got here, the harm they are causing to our native plants and animals, and how you can help stop the spread of these and other unwanted alien species. This program is a driving tour with several stops at key locations along the way. Participants must provide their own transportation. The tour features areas around Headache Hill and nearby, and begins at the Killbuck Boat Launch parking lot.