Inverlochy Castle and Greywalls hotel have joined the Small Luxury Hotels of the World luxury boutique hotel marketing consortium.
As a result, the properties will have access to SLH's global reservation platform as well as its sales, marketing and distribution services.
The 17-bedroom Inverlochy Castle (pictured) near Fort William is a 19th century baronial mansion; while the 23-bedroom Greywalls hotel is an Edwardian country house located on the edge of the Muirfield championship golf course in Gullane, East Lothian.
Daniel Luddington, vice-president of development at SLH, said: "It is a pleasure to welcome the beautiful Inverlochy Castle and Greywalls hotel as our newest Scottish properties. They align perfectly with our brand values and the independently minded ethos required of the SLH collection."
Norbert Lieder, managing director at Inverlochy Castle Management International (IMCI), added: "We are delighted to join an organisation as prestigious as Small Luxury Hotels of the World, that combines the same core values to offer intimate and personalised experiences for guests, with the highest standards of quality in hospitality. SLH will give us a great platform to connect with our global customers and strengthen our international image."