Rail services on the Inverness to Kyle of Lochalsh line will be disrupted for more than a week following a landslip.
The railway track through Achnasheen in the Highlands
Network Rail said it could be 10 days before the route reopens.
Heavy rain on Wednesday caused five separate landslips along a 20-mile (32km) stretch of track between Strathcarron and Achnasheen.
First ScotRail is running a bus replacement service on part of the Inverness-Kyle of Lochalsh route - between Achnasheen and Strathcarron.
Network Rail said passengers should contact First ScotRail's customer contact centre on 0845 601 5929 or National Rail Enquiries at http://www.nationalrail.co.uk or 08457 484 950 with any queries.