Elevations in the Park range from 700 feet above sea level to over 8,000, providing a wide range of climatic conditions, that follow the four seasons.
Be prepared for very warm weather in the summer months, in particular in the river valleys. The spring and fall are moderate and comfortable. Winter conditions can be severe in the higher elevations, with snow and ice making travel difficult and dangerous.
Did You Know?
In 1994 the Idaho Fish and Game Department drained Tolo Lake, a site of Nez Perce National Historical Park, for a restoration project. In the lake bottom, six to eight Columbian mammoth skeletons were found. A replica skeleton is on display in Grangeville, Idaho