A volunteer naturalist heads up a free hour and a half walk through Ashland's Lithia Park this morning.

A volunteer naturalist heads up a free hour and a half walk through Ashland's Lithia Park this morning.

The 10-11:30 a.m. tour takes place several times weekly through most of September.

Participants learn about trees, flowers, birds, climate, water, geology and history.

Details: 488-5340.