An Teallach – Bidein a' Ghlas Thuill is a Munro of 1,062.6 m in Highland. In the database's Loch Maree to Loch Broom region it is the highest of 20 register hills, above An Teallach – Sgurr Fiona and 18 others.
Its drop of 757 m is 71% of its height: the col linking it to higher ground is only 306 m above sea level. It overtops all four of its nearest neighbours; the tallest of them, An Teallach – Sgurr Fiona, reaches 1,058.7 m. All four of its nearest neighbours lie to the west, so it stands at the eastern edge of its group. The summit is marked by a trig point.
