SEQUIM — The geologic history and coastal evolution of Dungeness Spit will be featured during Rock Walk at 11 a.m. Saturday.

The free walk will be at the Dungeness National Wildlife Refuge. The entrance is at 554 W. Voice of America Road. The refuge entrance fee is waived for this program.

Geologist will lead

Dave Parks, a geologist with the state Department of Natural Resources, will lead the walk.

He will examine the stratigraphy of the coastal bluffs west of the base of the Dungeness Spit, as well as discuss recent research on the rates of coastal bluff erosion in the Dungeness drift cell.

The program is expected to last between an hour and a half to two hours.

The walk will begin at the upper overlook at the top of the trail leading down to the Dungeness Spit.

Participants should wear sturdy walking shoes and weather-appropriate clothing.

For more information, call the refuge office at 360-457-8451, ext. 25, or email david_falzetti@fws.gov.