Mackay, Idaho is a small town located in Custer County, surrounded by picturesque mountains, including the Lost River Range and White Knob Mountains. The climate in Mackay is classified as a semi-arid continental climate, characterized by warm summers and cold winters. Average temperatures range from the 20s °F (-6 °C) in winter to the 80s °F (27 °C) in summer. The region receives around 18 inches (46 cm) of precipitation annually, with most of it occurring during the spring and early summer months.

Mackay is known for its abundant hydrology constituents, with several rivers and creeks flowing through the area. The Big Lost River, Little Lost River, and Birch Creek provide opportunities for fishing, boating, and kayaking. These waterways are home to various fish species, including trout, salmon, and steelhead.

Outdoor enthusiasts will find numerous recreation opportunities in Mackay. The area is renowned for its hiking trails, with options ranging from easy walks to challenging mountain hikes. Popular destinations include Borah Peak, the highest point in Idaho, and the stunning Mackay Reservoir. Additionally, the nearby Challis National Forest offers opportunities for camping, hunting, and wildlife viewing. Whether you enjoy fishing, hiking, or simply immersing yourself in nature's beauty, Mackay offers a wealth of outdoor activities for all.