The Vitrified Fort

The tour goes over the hill of Bidean Bad na h-lolaire, 528 m, 5 km due West of the summit of Ben Nevis, the highest mountain in Britain, and provides wonderful views of the Ben and of Glen Nevis below. The route takes us past Dun Deardail, a Vitrified Fort where fire caused the rocks of the building to fuse together.

Highlights of the trip:

  • Learn the relationship between the Ben Nevis volcano and its surroundings
  • Most of the walk will take you over folded and recrystallized rocks of the Dalradian series
  • They are cut by vertical sheets (dykes) of volcanic rock
  • Reach the summit of Bidean Bad na h-lolaire, 528 m
  • Walk a section of the West Highland Way
  • Visit the Vitrified Fort at Dun Deardail and discuss the problems posed by the fused rocks

Starts and ends at Lochaber Geopark Visitor Centre, 55A Fort William High Street

Start time is 10am

End time 4.30 pm

Involves Walking distance approximately 15 km, with 650 m of ascent. A mixture of wide paths, narrow paths, rocky paths and boggy areas with no path. Please be prepared for Scottish west coast weather. See our clothing and equipment page for more information.

Walking Grade Strenuous

Cost and booking:

Cost and booking: 1 person £100 with a second person going free on the same booking. Extra persons on the same booking charged at 50% off, i.e £50 per person with a maximum of 8. Families (2 adults, up to 3 children): kids go free, just book adults in and let us know that children are coming.

Please select the number of people going on your trip and the discount will be applied in your basket ready for checkout online.

Other parties may be taking part in the same tour. Up to a total of 8 people per Geotour.

Discounts are on individuals party booking size and not the final group.

If you want to be the only person on a Geotour please visit book a Bespoke Geotour.

Please read our terms and conditions before booking.

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