Mullan, Idaho is a small town located in Shoshone County in the northern part of the state. It has a population of approximately 650 residents. The town experiences a humid continental climate, with warm summers and cold winters. Average temperatures range from the mid-20s Fahrenheit in winter to the low 80s in summer. Mullan receives about 50 inches of snow annually, providing a snowy landscape and opportunities for winter activities like skiing and snowboarding.

Hydrologically, Mullan is situated near the headwaters of the South Fork of the Coeur d'Alene River. The river and its tributaries in this area are known for their high water quality and support a diverse ecosystem. Mullan also sits close to the St. Joe River, which offers excellent trout fishing opportunities.

Outdoor recreation is abundant in Mullan and its surrounding area. The town is located near the Silver Mountain Resort, which provides skiing, snowboarding, and other winter sports during the colder months. Additionally, the area offers hiking, mountain biking, fishing, and camping opportunities during the warmer seasons. The nearby Coeur d'Alene National Forest and the Idaho Panhandle National Forests provide additional recreational opportunities for nature enthusiasts.