The best time to go to Ten Sleep is during the summer months, from June to August, when the weather is warm and dry.During this period, the Big Horn Mountains are fully accessible, making it ideal for outdoor activities like hiking, fishing, and rock climbing. You'll find comfortable temperatures for exploring the area's natural beauty, including Ten Sleep Canyon and the nearby national forests. This is particularly appealing for active travelers seeking adventure in a pleasant climate.Early autumn, specifically September, also offers good conditions with cooler temperatures and fewer crowds. The fall foliage provides a scenic backdrop for outdoor excursions.