Glen Duff is situated between the 21st Milestone and 22nd Milestone road-side marker on the Snaefell Mountain Course

Snaefell mountain course

Snaefell Mountain Course or Mountain Course is a road-racing circuit used for the Isle of Man TT and Manx Grand Prix Races held in the Isle of Man from 1911 and 1923 respectively. The racing is held on public roads closed for racing by an Act of Tynwald...

 used for the Isle of Man TT

Isle of Man TT

The International Isle of Man TT Race is a motorcycle racing event held on the Isle of Man and was for many years the most prestigious motorcycle race in the world...

 Races on the A3 Castletown to Ramsey

Ramsey, Isle of Man

Ramsey is a town in the north of the Isle of Man. It is the second largest town on the island after Douglas. Its population is 7,309 according to the 2006 census . It has one of the biggest harbours on the island, and has a prominent derelict pier, called the Queen's Pier. It was formerly one of...

 and the road junction with the B14 Road of the Ayre (Bernaharra Road) in the parish of Lezayre

Lezayre

Lezayre is a parish in the Sheading of Ayre and lies central and north in the Isle of Man. The parish is bounded by Michael and Ballaugh to the west, Andreas and Bride to the north, the town of Ramsey and the parishes of Lonan and Maughold to the east, and Braddan to the south...

 in the Isle of Man

Isle of Man

The Isle of Man , otherwise known simply as Mann , is a self-governing British Crown Dependency, located in the Irish Sea between the islands of Great Britain and Ireland, within the British Isles. The head of state is Queen Elizabeth II, who holds the title of Lord of Mann. The Lord of Mann is...

.

Glen Duff was part of the Four Inch Course

Four Inch Course

Four-Inch Course is a road-racing circuit first used for the 1908 Tourist Trophy Race for racing automobiles. The races were held on public roads closed for racing by an Act of Tynwald...

 used for the Tourist Trophy

RAC Tourist Trophy

The International Tourist Trophy is an award given by the Royal Automobile Club and awarded semi-annually to the winners of a selected motor racing event each year in the United Kingdom. It was first awarded in 1905 and continues to be awarded to this day, making it the longest lasting trophy in...

automobile car races held in the Isle of Man between 1908 and 1922. Glen Duff is part of the Snaefell Mountain Course used since 1911 for the Isle of Man TT Races and from 1923 for the Manx Grand Prix.

The Engineering Work Section, Highways Division of the Isle of Man Department of Transport has depot at Glen Duff including a warehouse known as the igloo for storing road salt for treatment or roads during the winter in the Isle of Man.

External links

• Map of course