Dennis L. Edwards Tunnel

Historical marker location:

Seaside, Oregon

( Marker can be reached from Sunset Highway (Route 26 at milepost 28) near Olson Road, on the right when traveling west.)

Crater Lake, located in southern Oregon, is the deepest lake in the United States and one of the deepest in the world. It was formed over 7,000 years ago when Mount Mazama erupted and collapsed, creating a caldera that filled with water.