
Porcupine Mountains Wilderness
State Park, Michigan, contains 35,000 acres of old growth
hemlock and sugar maple forests. Photo by Lee Frelich.

Giant sugar maple
near Presque Isle River. Photo by John Knuerr

Presque Isle River
rapids. Photo by Jörgen Sjögren.

Swedish moss expert,
Jörgen Sjögren, inspecting Anomodom
moss on a maple trunk. Photo by Lee Frelich.

Moss-covered basswood
trunk. Photo by John Knuerr.

Hemlock seedling browsed
by deer. Photo by Lee Frelich.

Three hundred year
old white pines on Overlook Trail. Photo by Lee
Frelich.

Yellow birch saplings
enter a gap caused by death of three ancient hemlocks.
Photo by Lee Frelich.

Multi-age hemlock
forest, trees from 80 - 550 years old. Photo by
Lee Frelich.

Multi-age forest of
mixed maple and hemlock. Photo by Lee Frelich.

Ancient hemlock forest,
Pinkerton Creek. Photo by John Knuerr.