From the Baltimore Beltway, head north on I-95 to the Whitenmarsh exit. Head east to Route 40, and "clover-leaf" onto Route 40 north. Look for the sign to Gunpowder Falls State Park (less than a mile on the right). Follow the road for about 5 miles; the park is on the left. There are signs for the park on this road to keep you going in the right direction.