Cronk-ny-Mona

Cronk-ny-Mona (Manx: Hill of the turbary)is situated between the 36th Milestone and 37th Milestone road-side marker on the Snaefell Mountain Course on the primary A18 Mountain Road and the road junction with the A21 Johnny Watterson Lane and the tertiary C10 Scholag Road in the parish of Onchan in the Isle of Man.

Cronk-ny-Mona was part of the Highland Course and Four Inch Course used for the Gordon Bennett Trial and Tourist Trophy automobile car races between 1904 and 1922. The Cronk-ny-Mona road junction is part of the Mountain Course used since 1911 for the Isle of Man TT and from 1923 for the Manx Grand Prix Races.

For the 1920 Isle of Man TT Races, changes were made to the Mountain Course and competitors now turned left at Cronk-ny-Mona and followed the primary A18 Mountain Road to Governor's Bridge with a new start/finish line on Glencrutchery Road which lengthened the course to 37¾ miles. To facilitate racing on the Clypse Course for the 1954 Isle of Man TT Races, during the winter of 1953/54 road widening occurred on the Mountain Course at Creg-ny-Baa along with Signpost Corner, the section of road from Hillberry Corner to Cronk-ny-Mona and the approach to Governor's Bridge.