The 83-year-old completed the La Sportiva Lake District Mountain Trial’s Classic course – an 18-mile course with 7500ft climb.
Naylor – known also as Iron Joss – said it was “unfinished business” after having to withdraw from the race 57 years ago.
At the age of 26, his first attempt was cut short by extreme weather. He said:
“The wind and rain were so bad on that day that you couldn’t even stand up.
“As you got down into the fells you disappeared into the mist.
“I had salt tablets to help the cramp but they dissolved in the storm.”
In more forgiving weather, Joss completed the 12.5-mile route which he couldn’t quite finish 57 years before.
“It took him six hours and 20 minutes, including a stop for a sandwich and we ended the day in the local pub where Joss enjoyed a Guinness. It was also great to see so many people turn out to support him including his contemporaries Peter Hall, Peter Nelson and Ken Ledward.”
Joss’ records include breaking the Lake District 24-hour record three times and FKT’s on the Three Peaks, Welsh 3,000ers and Pennine Way.
Running the Trial this year, Joss raised over £50,000 for the Brathay Trust.