Heart of the Monster, a rock formation said to represent the heart of a monster in an important Nez Perce legend is located in East Kamiah. The site is approximately 53 acres of NPS-owned land 2 miles upstream from a bridge across the Clearwater River in Kamiah, Idaho.

This site was a major prehistoric and historic Nez Perce crossing point of the Clearwater River. The nontreaty Nez Perce forded the Clearwater at this location during the 1877 war.

An interpretive shelter with two exhibits offers an audio program to give background information on the role of legends in Nez Perce culture and tell a part of the "Coyote and the Monster" legend in Nez Perce and in English. A short trail leads to the Heart of the Monster formation, where a small semicircle of seating is available to listen to the audio program there. The site has been designated by the state of Idaho as a "watchable wildlife" site.

The site is well signed and easy to find. There is a paved entrance loop with parking for eight cars. Available visitor facilities include restrooms, a bulletin board with park information, a water fountain, picnic tables, the interpretive shelter, and two short trails, one to the interpretive shelter and a loop trail that goes out to the Heart of the Monster formation.

The surrounding land is used for a mixture of agricultural, residential, and small commercial concerns. The 325-unit RV park, just across the highway from the site, is one of the largest private campgrounds in Idaho. Its expansion, together with the construction of a motel and residential housing in recent years, has encroached near the eastern part of the site.

The Kamiah community has expressed an interest in developing a walking path from Kamiah to the site. The path will run between the boundary and U.S. Highway 12.