The best time to visit Blue Mountain Lake is during the summer months, from June to August, or in the autumn, particularly from late September to mid-October.Summer offers the warmest weather, with average temperatures in the low to mid-20s Celsius, making it ideal for water activities on the lake such as kayaking, canoeing, and swimming. The days are long, allowing for extended exploration of the surrounding Adirondack trails. This period is great for families looking to enjoy outdoor adventures together.Autumn brings a spectacular display of fall foliage, transforming the landscape into a canvas of reds, oranges, and yellows. The air is crisp, and temperatures are generally cooler, ranging from 10 to 18 degrees Celsius, which is excellent for hiking and scenic drives.