Penn Run, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Penn Run, Pennsylvania, United States, is known for its proximity to Yellow Creek State Park. The best time to travel to Penn Run, United States, is in late spring (May to early June) when the average air temperature is around 65-75°F and water temperature in nearby lakes is approximately 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!