Blind Mountains is a place featured on the 1987 sticker book's map.
A formidable mountain range that can be traversed through a series of tunnels and caves or by going over Wretched Pass. The heroes encounter drow plus Lolth and her spider web inside the mountain and outside on a cloudy plateau the Spirit King summons some aarokocra. So although they have separate entries on the map it is possible that the Drow Caverns, Lolth's Lair and the Aarakocra Lair are all parts of the Blind Mountains. Friendly peskies also inhabit the mountain's tunnels and caves.