Highlands Ranch, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Highlands Ranch, Colorado, United States, is known for its proximity to the Rocky Mountains and the nearby Chatfield State Park. The best time to travel to Highlands Ranch, United States, is during the summer months of June to August, when the average air temperature is around 70-85°F and water temperature in nearby lakes is approximately 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!