Site information:

On State Hwy 18 (P.M. 76.9) at Rabbit Springs Rd, 3.2 mi W of Lucerne Valley

I believe the actual rock referred to is at this location:

34.468702, -117.016299

But the site commemorates the battle, not the rock itself, and as far as I know nothing remains of the battle site.

Plaque information:

State and private plaques

34.450170,-117.003925

State plaque text:

Chimney Rock

Conflicts between Indians and white settlers over the rich lands of the San Bernardino Mountains culminated in the battle at Chimney Rock on February 16, 1867. Although the Indians defended themselves fiercely, they were forced to retreat into the desert. In the years following, the Indians' traditional mountain food gathering areas were lost to white encroachment.

Originally registered June 6, 1960. Plaque placed by the State Department of Parks and Recreation in cooperation with Billy Holcomb Chapter of E Clampus Vitus, Lucerne Valley Museum Association, and Lucerne Valley Chamber of Commerce, May 4, 1986.

Private plaque text:

The last Indian fight in Southern California

In January 1867 Indians left their camp east of Chimney Rock to go into the San Bernardino Mountains where they looted and burned several cabins and a sawmill. In retaliation, a posse surprised the Indians at their camp and killed and wounded many, thus ending hostilities.

Registered 6/6/1960