LOST

Minnesota

Finland Air Base
Grandview Golf and Ski Club
Hidden Valley
Lester-Amity Park
Lakeview   (jump only ?)
Lookout Mountain
Mt. Rockwood
Mt. Silver
Ojibway Ski Bowl (Fund du Lac) 
Pine Valley 
Quadna
Sawtooth Mountain Ski Area
Ski Kenwood  
Sugar Hills
Trout Valley
Two Harbors (may be Mt. Silver)
Rock Hill (Univ. Of Minn. Duluth)  Voyageur's Skiway  

Wisconsin

Amnicon Ski Area
Eagle Bluff
Echo Valley ?? 
Manitou Valley
Moquah Ski Hill Rd. ??
Nemadji Hill
Sunny Acres Ranch

STILL OPEN

Minnesota

Wisconsin

1960

The Duluth News Tribune (Duluth, Minnesota) · Sun, Dec 18, 1960

The Duluth News Tribune, Duluth, Minnesota · Sunday, January 17, 1960 - Page 1 / Page 2 (map)

1964

Duluth News Tribune, Jan. 12, 1964   page 1  /  page 2