GUNPOWDER FALLS STATE PARK AT JERUSALEM MILL – 4.5 / E Loading view. Hike Schedule Views Navigation Hike Views Navigation Summary List Month Today Upcoming Upcoming Select date. Jul 2023 Sat 29 10:00 am - 1:00 pm Event Series GUNPOWDER FALLS STATE PARK AT JERUSALEM MILL – 4.5E Previous Hikes Today Next Hikes