YAKIMA, Wash. (AP) - Some historians write books, delineating events of an era. Others shoot films documenting life in their time. But some historians leave their stories on rocks.

The Yakima Herald reports these historical records etched or painted on rocks have endured through the ages.

About 1,500 people take in guided petroglyph hikes each year. They're given on Fridays and Saturdays at 10 a.m. from spring through fall.

The next hikes begin again in April and reservations, which are required, start in January.