Dendrology (the study of trees) is meeting technology through Dec. 31 at James River State Park.

The program, which runs from 8 a.m.-8 p.m. every day the park is open, teaches visitors how to learn GPS navigation and tree identification.

Staff selected 25 species of native trees throughout the park and created a pamphlet about the trees and their GPS coordinates to help find them.

“If you find all 25, we have a nice prize for you,” park officials said.

The park rents GPS units with the tree coordinates already loaded for $6 for a half day or $10 for a whole day. The units and pamphlets are available at the Visitor’s Center.

James River State Park is in Buckingham County at 104 Green Hill Drive, Gladstone.