The 1913 Isle of Man Tourist Trophy races were increased in length to a six lap (226 mile) Junior race and to seven laps (262.5 mile) for the Senior race. The highest number of entries to date, one hundred and forty seven, were received for these races.
The 350cc Junior TT was won by H.Mason 2þ hp NUT-Jap motor-cycle and the 500cc Senior TT Race by Tim Wood with a chain-driven 3ý hp Scott machine.
While leading the Senior TT race, Frank Bateman, riding a Rudge crashed fatally on the fourth lap below the Shephard's Hut near to Keppel Gate.
Continental entries for the Senior TT race included E. Vailati (3ý hp Rudge) from Italy, K. Gassert (3ý hp NSU) from Germany and a Russian entrant M Kremleff also riding a Rudge, but he retired after crashing.
Wednesday 4 & Friday 6 June 1913 â 6 laps (225 miles) Isle of Man TT Mountain Course
Fastest Lap: H.Mason â 45.42 mph (49â 32.0) on lap 6.
Wednesday 4 & Friday 6 June 1913 â 7 laps (262.50 miles) Isle of Man TT Mountain Course
Fastest Lap: H.O. Wood â 52.12 mph (43â 10.0) on lap 3.