Nature Conservancy Maine Preserves Manager Daniel Grenier gives a tour of the Sprague Pond Trail in Phippsburg.

Grenier walks through a Pitch Pine Woodlands, a rare habitat in Maine, part of the Sprague Pond Trail property in Phippsburg, which he manages.

Grenier opens the gate to the American chestnut tree restoration field.

American chestnut seedlings are protected by a plastic tubes in the Nature Conservancy's restoration project field near the Sprague Pond Trail parking area.

A seedling is protected by a plastic tube in the Nature Conservancy's American chestnut tree restoration field.

Trail markers guide point the way on the Nature Conservancy's Sprague Pond Trail.

Grenier walks along the Sprague Pond Trail in Phippsburg.