Grant MacLeod filmed himself atop Stob Bàn in the Mamores mountain range in Lochaber yesterday as he commemorated Sarah’s passing.
Sarah went missing shortly after posting a selfie at the peak of the UK’s tallest mountain last week.
Her body was discovered almost 2,000ft down from the 4,413ft summit two days later.
A moving video shows Grant, 34, paying his respects to the 24-year-old and others who have lost their lives in the mountains by playing The Sands of Kuwait.
Grant, from Glasgow, introduces his song with a short tribute, saying: “This is a tune in memory of Sarah Buick, who sadly lost her life here in the Scottish mountains this week, and also for all those affected by people lost in the mountains over the years.”
Gym instructor Grant was filmed wearing a green kilt, green socks with a brown sporran and a dark Glengarry Pipers hat during the performance.
In the distance is a stunning view of the beautiful but treacherous Ben Nevis where Sarah died.
The barren landscape is largely green with grey rocky peaks at the top of the extreme slopes.
Grant shared the video to Facebook this morning writing: “A little tune for Sarah today, and for those who we have lost in the mountains through the years.”
The post has now collected over 400 likes, with dozens of shares and comments from Facebook users who were touched by the tribute.
Annette McArthur wrote: “Thoughtful gesture for a beautiful girl.”
Bernadette Carlin said: “A beautiful tribute… brought tears to my eyes.”
Melissa Cummins commented: “Fantastic tribute.”
Lindsay Nicol added: “Beautiful.”
Speaking today Grant said: “The story hit home with the nature of a young person enjoying herself only to end in tragedy.
“I felt it right to pay tribute to her and also all those who have sadly been lost in the mountains.
“Munro bagging is becoming more and more popular, and the risks should be highlighted.
“I felt it important to mention the previous losses through the years that often don’t get heard about.
“Especially with the popularity of bagging increasing, even on ‘easier’ routes, accidents happen.”