Donnelly is a small town located in Valley County, Idaho. The climate in Donnelly is characterized by cold, snowy winters and mild summers. The town is situated near the Payette River, which provides opportunities for outdoor recreation such as fishing, kayaking, and rafting. Donnelly is also close to the Tamarack Resort, which offers skiing and snowboarding in the winter, and mountain biking and hiking in the summer. The hydrology constituents in the area include the Payette River and Cascade Lake, which provide irrigation water for nearby farms and ranches. Overall, Donnelly offers a unique blend of outdoor recreation opportunities and natural beauty.