title: Glen Duff
text: # Glen Duff
  
  Glen Duff (Manx: black glen) is situated adjacent to the 23rd road milestone on the A3 Castletown to Ramsey road with the junction with the B14 Bernaharra Road (Road of the Ayre) in the parish of Kirk Christ Lezayre in the Isle of Man.
  
  ## Description
  
  The Engineering Work Section, Highways Division of the Isle of Man Department of Infrastructure has its northern depot at Glen Duff Quarry, including a domed storage barn built in 2003 known as the 'Igloo', for storage of road salt treatments during the winter. The previous Isle of Man Highway and Transport Board Glen Duff depot was damaged by fire in a works highway garage in 1953.
  
  The Glen Duff Depot and Glen Duff old quarry (previously known as Manx: Gob-y-Vuinney) has been identified within the Ancient Woodland Inventory by the Manx Wildlife Trust. Within the 2.57 hectares (6.4 acres) site, the Trust observed hazel (Corylus avellana), oak (Quercus × rosacea) and silver birch (Betula pendula) trees along with wild strawberry (Fragaria vesca) within the depot and old quarry.
  
  ## Motor-Sport heritage
  
  Glen Duff was part of the 37.50 Mile Four Inch Course for the RAC Tourist Trophy automobile races held in the Isle of Man between 1908 and 1922.
  
  In 1911, the Four Inch Course for automobiles was first used by the Auto-Cycling Union for the Isle of Man TT motorcycle races. This included Glen Duff and Glentramman section and the course later became known as the 37.73 mile Isle of Man TT Mountain Course which has been used since 1911 for the Isle of Man TT Races and from 1923 for the Manx Grand Prix races.
  
  ## Sources
  
  * ↑ Place Names of The Isle of Man – Da Ny Manninee Dooie Volume Three. Sheading of Ayre: (Kirk Andreas, Kirk Bride and Kirk Christ Lezayre) page 393 Kirk Christ Lezayre by George Broderick – Turbingen ; Niemeyer NE:HST (1997) Manx Place- Name Survey, ISBN 3-484-40138-9 (Gesamtwerk) 3-484-40131-1 (Band 3) ©Max Niemeyer Verlag Tubingen Druck: Weihert-Druck GmbH Darmstadt Einband: Siegfried Geiger, Ammerbuch. " Glenduff. Farm ct SC49SW SC41309410").
  * ↑ Liverpool Echo page 8 Saturday 11 December 1954
  * ↑ Isle of Man Department of Local Government and the Environment Planning Section 27 May 2003 Planning Application: 02/02121/B
  * ↑ Mona’s Herald page 5 Tuesday 29 September 1953
  * ↑ Ramsey Courier page 6 Friday 12 August 1960
  * ↑ Place Names of The Isle of Man – Da Ny Manninee Dooie Volume Three. Sheading of Ayre: (Kirk Andreas, Kirk Bride and Kirk Christ Lezayre) page 400 Kirk Christ Lezayre by George Broderick – Turbingen ; Niemeyer NE:HST (1997) Manx Place- Name Survey, ISBN 3-484-40138-9 (Gesamtwerk) 3-484-40131-1 (Band 3) ©Max Niemeyer Verlag Tubingen Druck: Weihert-Druck GmbH Darmstadt Einband: Siegfried Geiger, Ammerbuch.
  * ↑ Oak/Hazel Woodlands of the Isle of Man Part II Page 5-7 Ancient Woodland Inventory 3 GLEN DUFF Andree Dubbeldam Manx Wildlife Trust (2011) Wildflowers of Mann Project
  * ↑ TT Pioneers – Early Car Racing in the Isle of Man page 22 Robert Kelly, Mercury Asset Management (1996)(1st Edition) The Manx Experience, The Alden Press ISBN No 1 873120 61 3
  * ↑ Round the TT Course with Harold Daniell R.R. Holliday Motor Cycling (c1947) Castrol Oils That Lap at 91! Harold L.Daniell, TT Record Holder. Tells How it was done.
  * ↑ TT Special page 31 edited by G.S. Davison Wednesday 6 June 1956
  * ↑ The History of the Manx Grand Prix page 7, 8, 9 by Bill Snelling Amulree Publishing(1998) Manx Heritage Foundation ISBN 1 901508 04 8
  