Stac Biorach, Coastal rock formation in St Kilda archipelago, Outer Hebrides, Scotland.
The 73-meter tall triangular sea stack stands between the islands of Hirta and Soay in the Sound of Soay.
The first documented recreational climbing expedition to Stac Biorach occurred in 1883, led by Richard Barrington with assistance from two St Kilda residents.
Local traditions required young St Kilda men to demonstrate their climbing abilities on Stac Biorach before they received permission to marry.
Accessing the rock formation requires careful navigation due to its smooth surfaces and the strong waves in the surrounding waters.
The rock formation earned the name 'Thumb Stack' as climbers could only find finger holds the size of a thumb when scaling its surface.
Location: Outer Hebrides
GPS coordinates: 57.82889,-8.62167
Latest update: March 5, 2025 13:58
Flannan Isles Lighthouse
79.5 km
St Kilda
2.5 km
Boreray
9 km
Ceann Ear
69 km
Ceann Iar
67 km
Scolpaig Tower
70.7 km
Sibhinis
67 km
Balranald RSPB reserve
70.9 km
Old Monach Lighthouse
64.6 km
Baleshare Causeway
82.2 km
Struan Cottage
77 km
Bac Mic Connain
73.9 km
St Kilda World Heritage Site
3.6 km
North Uist, Claddach-kyles, Westford Inn
78.3 km
North Uist, Trumisgarry Church
83.6 km
Paible Free Church, North Uist
74.3 km
New Monach Light
64.6 km
Balranald Church, North Uist
72.3 km
Dun Scolpaig, dun (site of) and tower
70.7 km
Haskeir Lighthouse
57.3 km
Mullach Bi
1.9 km
North Uist, Caisteal Odair
70.2 km
Eilean Domhnuill,settlement,Loch Olabhat
72.1 km
Cille-Pheadair,cross 800m N of Balmartin
70.5 km
St Kilda, Gleann Mor, settlement
1.9 km
Sgeir Dhomhuill
3.5 km
St Kilda village and related structures
3.5 km
St Kilda, Geo Chrubaidh, settlement
1.1 kmReviews
Visited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes