I skied at Sugar Loaf a couple of times around 1970. Didn't they have a trail called Hemlock or was that Boyne?
Other closed MI ski areas that I can think of:
Mt. Grampian in Oxford (east of town). They had one double chairlift and some surface lifts.
SilverBell in Lake Orion (east of town). All that I remember at SilverBell were surface lifts and maybe 150 feet of vertical.
Teeple Hill west and south of Alpine Valley in the Highland State Rec Area. At one time they had 200 ft vertical and several rope tows.
I skied at Thunder Mtn once around 1970 also. It was a Boyne-family ski-area north of Walloon Hills, another closed Boyne property. Thunder Mtn had either one or two double chairlifts and some surface lifts, and Walloon only had t-bars and surface lifts.
At one time Franklin Hill in Franklin, MI had either a t-bar or a j-bar and rope tows too. Some friends and I destroyed a toboggan there in 1976.
Riverview Highlands was illegally built without proper permits and after a protracted battle the city forced the owner to remove the trash. At one time it had a couple of chairlifts and about 200 feet vertical.
Irish Hills Winter Sports Park had one double chairlift at one time near Brooklyn, MI. I remember ads for it in the 1970s.
Is Mio Mountain open or closed? How about Sylvan Knob? Or Otsego?
Back in the early 1970s I skied as part of a youth group at Bear Mtn west of Grayling. They had a high-speed toboggan slide that I remember and one chairlift.
I grew-up in the Keego Harbor/Orchard Lake area and grew-up skiing at Alpine Valley. I first started skiing it was on what then was a t-bar at Stowe, VT when we lived for 2 years in Burlington, VT in the 1961/62 ski season. I had one aunt who lived near Okemo and another that owned a condo at the base of Burke Mtn in Vermont. During the 1960s/70s/80s I skied a lot in New England and western NY State. I remember Okemo when they had 7 diesel pomalifts on 2100 feet vertical, Killington when their old gondola was brand-new, and even Round-Top, VT, which is now The Bear Creek Club. Another place in New England that I recommend is Waterville Valley on weekdays, as they have 2000 feet vertical and a base to summit HS quad. The closest skiing with over 1000 feet of vertical to Detroit is Bristol Mtn south of Rochester, NY though you will need a passport to drive there through Canada these days. In 1975-77 I went to Western Michigan University and skied at Timber Ridge several times. In 1983 I moved to Colorado and in 1983-84 I was a lift operator at Beaver Creek. These days I live an hour drive to Eldora Ski Area in Colorado, which has 8 chairlifts on a 1600 ft vertical drop. Nothing like Corona Face when it is groomed!
Talk about cheap!!! My wife just got a deal to fly Southwest Airlines from Denver to Indianapolis for $59 each way!!! Detroit to Denver can be had for $119 on either Southwest or Frontier, and Chicago Midway to Denver is $89. Out of Cleveland Southwest is $99 and Frontier flies out of Akron/Canton for the same price. You can even fly to Denver from Dayton for $99 on Frontier too. Ski season here will last another two weeks and several higher-altitude ski areas will be open into and through May. Check-out both Arapahoe Basin and Loveland Basin as they will both stay open late.
Other closed ski area websites:
Nelsap.org covers New England and has links to a website covering closed Washington and Oregon ski areas, and separately closed California ski areas.
DC SKi covers closed ski areas in the mid-Atlantic region including Pennsylvania, Maryland, North Carolina, and Virginia. I have skied at Laurel Mtn, PA, which was a former private ski area with 900 feet vertical that has been closed for some years. It was recently bought by Seven Springs and may reopen.
Colorado Ski History.org has closed ski areas in Colorado, New Mexico, Wyoming, and Utah. I have skied at both Berthoud Pass and Geneva Basin which are on their closed ski areas list.
Any more closed Michigan ski areas that anyone can think of? Another one that I can think of is south of Grand Haven that had rope tows but I can't remember the name of the place or when it closed. Is Pando (NE of Grand Rapids) still open? That was a quaint little ski area.
The Old Timer, 48 seasons of skiing history!!!