Castle Valley, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Castle Valley is known for its stunning red rock formations and proximity to the iconic Castleton Tower, a popular destination for rock climbers and outdoor enthusiasts. The best time to travel to Castle Valley, United States, is in late spring (May to June) when the average air temperature is around 70-80°F and water temperatures in nearby rivers are typically 50-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!