The 1911 Isle of Man Tourist Trophy races took place for the first time over the Snaefell Mountain Course. The whole organisation of the races was given over to the (ACU), which announced the use of the longer mountain course with a four lap (150 mile) Junior race on Friday 30 June, and five laps (189 mile) for the Senior race on Monday 3 July. In only five years the TT races had matured and commercialism had set-in. Grandstands were built by the Douglas Corporation in what had been popular and free vantage points in Douglas, to the displeasure of the public.
Preparations for this new, challenging course that meant an eight-mile (13 km) uphill climb from Ramsey to Brandywell prompted the manufacturers to devise methods of modifying their mainly single-gear machines to cope with the Snaefell mountain road not once, but several times. Harold Collier, on the single-cylinder Matchless, and Percy J. Evans fought for first place in the Junior event. In the Senior event, British pride and prestige was dented when the Indians took the first three places. Charlie Collier crossed the finish line second on his Matchless, but was disqualified for refuelling outside of the designated area.
Friday 30 June 1911 – 4 laps (150 miles) Four Inch Course/Snaefell Mountain Course
Fastest Lap: Percy J Evans 2¾ hp Humber – 42.13 mph (53 minutes 24 seconds)
Monday 3 July 1911 – 5 laps (187 miles 4 furlongs) Four Inch Course/Snaefell Mountain Course
Fastest Lap: Frank Phillip 4 hp Scott – 50.14 mph (44 minutes 52 seconds)