The shoreline of the State Park North Shore Loop Trail is known as The Alvar. Alvars are unusual landforms which occur in glaciated regions of the Northern Hemisphere. They were once thought of as barren but are now known to contain numerous and distinctive plants and animals. The formation of soil and resulting growth of woody plants are hampered by drought-induced by the porous bedrock. Alvars are subject to constant scouring by waves and ice and temperature extremes. The trail head is located in the State Park fisherman’s parking lot.