Part of the problem is if you search "Lost Canyon Ranch" in google, there are multiple results in Colorado, and in other states. I dont think your source is correct for Glencoe not being for sale, or, the listing online and the listing at the gate to Glencoe are wrong. I have been to the site of Glencoe and it is just beyond the gate which is listed for sale.
There are many divided lots for sale at $200k each, or the whole plot for $4.8 mil. You can't access any of the lots without going through Glencoe as it is almost the first thing you encounter after passing the gate. I am about 10 minutes from Colleyville, TX. If you can find the "owner" of this land I can talk to them in person.
Rich, PM me if you will as I would like to know who your source is. I was physically there and I don't think this is correct.
Casey