Mountain Lake Park, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mountain Lake Park is known for the historic Mountain Lake Park Historic District and its charming Victorian-era architecture. The best time to travel to Mountain Lake Park, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature is approximately 70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!