The best time to visit Ben Lomond is during the spring (September to November) or autumn (March to May) months.During spring, the weather is pleasantly mild, and the countryside is vibrant with blooming wildflowers, making it ideal for outdoor activities like hiking and exploring the national park. Temperatures are comfortable for daytime excursions, and the evenings are cool but not cold.Autumn also offers excellent conditions, with crisp air and stunning displays of changing foliage, especially in the surrounding New England High Country. This season is superb for scenic drives, photography, and enjoying the local produce at a more relaxed pace without the summer crowds.