Cathedral Mountain, Mountain summit in Yoho National Park, Canada.

Cathedral Mountain is a mountain in Cradle Mountain-Lake St Clair National Park in Tasmania's central highlands, reaching 1,387 metres. Its western side is a cliff face dropping about 700 metres to the Mersey Valley floor, with the upper Mersey River running directly beneath it. The Overland Track passes within 2 kilometres of its southern side.

Cathedral Mountain lies within Cradle Mountain-Lake St Clair National Park, part of the Tasmanian Wilderness UNESCO World Heritage area. Its church-related name belongs to a cluster of nearby features such as Chalice Lake, Chapter Lake, Bishop Peak and Dean Bluff. In recent decades a large section of the upper mountain broke away and crashed through the rainforest below, leaving a scar visible from kilometres away.

Most features around the mountain carry church-based names: Chalice Lake, Chapter Lake, Cloister Lagoon, Convent Hill, Bishop Peak, Curate Bluff, Vicar Bluff and Dean Bluff. The naming reflects the cathedral image of the western cliff face, and walkers on the Overland Track pass these names on the map within about 2 km of the south side.

The usual ascent starts at the southern end of Mersey Forest Road, east of Lake Rowallan, following the Moses Creek track past Chapter Lake, Grail Falls, Chalice Lake and Tent Tarn. The final two kilometres to the summit are largely trackless, with only occasional cairns. The Overland Track, which passes within 2 km of the south side, is walked north to south with a booking and fee system from November to April.

Most features around Cathedral Mountain carry church-based names: Chalice Lake, Chapter Lake, Cloister Lagoon, Convent Hill, Bishop Peak, Curate Bluff, Vicar Bluff and Dean Bluff. The naming follows the mountain's cathedral-like profile above the Mersey Valley.