The best time to visit Glen Haven is during the late spring, summer, and early fall months, specifically from May to October, when the weather is most pleasant and all attractions are fully accessible.During these months, the temperatures are generally mild to warm, making it ideal for outdoor activities like hiking, fishing, and exploring Rocky Mountain National Park. The roads and trails are typically free of snow, allowing for unrestricted access to scenic drives and trailheads. This period is superb for couples and families looking to enjoy the natural beauty of the area without weather-related limitations.The shoulder seasons, particularly May and October, offer a quieter experience with fewer crowds and often beautiful fall foliage in October. While some services might have reduced hours, you'll still find plenty to do, and the cooler temperatures can be very comfortable for extended hikes.