Bayhorse is a ghost town located in central Idaho, in Custer County. It is located on a small tributary of the Salmon River, about 3 miles east of Challis. In the late 1800s and early 1900s, Bayhorse was a bustling mining town, established in 1875.

At its peak, the town had over 1,000 residents, three churches, two hotels, a school, stores, saloons, and a newspaper. People came from all over the world to work at the Bayhorse mines, which produced lead, silver, and gold. The mine was the largest producer of silver in Idaho, with over 30 million dollars worth of silver being produced in the first three years.

The town began to decline in the early 1900s as the mines began to become exhausted. By the 1930s, the town was largely abandoned and has remained a ghost town ever since.

Today, Bayhorse is a popular destination for hikers, campers, and photographers. It is also home to a few permanent residents. Several of the original buildings are still standing, including the Bayhorse Inn, the Bayhorse School, and the Bayhorse Store.

The town is accessible via a short dirt road, and visitors can explore the old buildings and take in the peaceful atmosphere of this once-thriving town.