A fitness fanatic collapsed and died while having a cup of coffee four days after completing a gruelling 66-mile race.
Fighting fit John King, 47, collapsed without warning as he chatted with an elderly customer in Inverness.
The window cleaner was a taekwondo black belt, had climbed more than 60 Munros and had no known health issues.
Less than a week before his death he stormed to the finish line in the Loch Ness Etape cycling race.
Devastated family and friends are now awaiting the results of a post-mortem to find out what caused his death.
His partner Dilys Couttie said: “He was so pleased that he had broken his four-hour target, finishing the Etape in three hours 58 minutes. He seemed fine afterwards although tired, naturally.
“He always seemed so fit with his cycling, taekwondo to black belt level and six years ago he started bagging Munro mountains and had done more than 60. He was always well and never had any health problems.
“He was so well liked locally, a really obliging man who took a pride in being a traditional window cleaner who used ladders at height and not the long poles, as he said they did not do such a good job. He took a pride in his work.”
John collapsed while having coffee with an elderly client whose windows he had just finished cleaning.
Despite the ambulance arriving in just three minutes and doctors fighting to revive him for more than an hour, he died at Raigmore Hospital.
More than 300 mourners attended his funeral at Inverness Crematorium last Wednesday, May 15.
Mr King’s taekwondo instructor Sandy Dunbar said: “I have known John for 20 years and he was one of life’s good guys and a great friend.
“We were having a laugh when he came to training on the Tuesday, two days before he died, because he was walking funny after doing the etape at the weekend.
“Then when he wasn’t there on Thursday night we were joking that he probably couldn’t get out the car, not realising that he was dead.
“He will be greatly missed by all at the club.”
Mr King’s step-daughter Rachel, a university financial administrator, said: “Mr Dunbar described his friend as ‘a champion talker who would do anything for anyone’.
“He really was the most amazing step-dad I could ever ask for.”
Miss Couttie is now considering taking on her partner’s business herself.
“I’m going to take time to think about it,” she said.
“A lot of John’s clients have said they will wait until I decide, which is really lovely of them. He will be sorely missed by so many people.”