California State Park's botanist, Laura Julian will lead a dunes native plant exploration 1-4 p.m. Sunday to the county's oldest and biggest living dune.

The 2-mile walk around Tolowa Dunes offers an opportunity for participants to learn about the rare plants that have survived for centuries in a world of sand.

Participants also can help volunteers with dune restoration by removing invasive non-native European beach grass, which is destroying dune habitat, from the sand. It was introduced to the area during the 19th and early 20th centuries.

If you want to help pull beach grass, wear sturdy walking shoes, bring a shovel, hat, work gloves, water and snacks.

Participants should meet at Lake Earl Wildlife Area Headquarters, 2591 Old Mill Creek Road.