Mackay’s new “Lost River Museum”, operated by the South Custer County Historical Society, opened May 2017 on Main Street next door to the US Post Office.

The Museum houses a collection of historical artifacts and unique items donated by Mackay community and Lost River Valley residents.  Its large display area is visitor friendly, well lighted, and handicapped accessible. Display artifacts are close at hand, easily viewed, and well interpreted.  Features include a fully restored sheep wagon, a large, visitor interactive hard-rock mining exhibit, an extensive gallery of historic photos, and a large local newspaper and print shop exhibit. 

Themed display areas include... farm and ranching ... Mackay branch railroad ... Mackay movie history ... early-day school room ... sports and recreation ... children’s toys and games ... early Mackay businesses ... early-day homestead cabin and artifacts ... musical instruments ... Mackay churches and organizations ... old-time clothing and fashions ... a large patriotic and military uniform collection, and an extensive local history reference book collection and reading area.

There is no admission charge but donations are welcome. The museum is open May through September, each Friday and Saturday, 11:00 AM to 4:00 PM.  Open at any time by appointment for groups of 4 or more by calling (208) 588-4500, 589-7847, 588-2257, or 588-3133.

LOST RIVER MUSEUM

 Homestead Cabin Exhibit

 Newspaper Exhibit

 Sheep Wagon Display

 Mining Display

Photo Exhibit