List of Snaefell Mountain Course fatal accidents List of fatal accidents involving competitors List of fatal accidents involving competitors

| Rider | Date_ | Place | Race | Event | Machine |
|---|---|---|---|---|---|
| Denis Blower | 3 June 1970 | Mountain Box | 1970 Isle of Man TT | Practice | 499cc BSA Sidecar |
| Santiago Herrero | 8 June 1970 | 13th Milestone | 1970 Isle of Man TT | Lightweight TT | 250cc Ossa |
| John Wetherall | 12 June 1970 | Garderner`s Lane/Glen Aulydn | 1970 Isle of Man TT | Senior TT | 499cc Norton |
| Brian Steenson | 12 June 1970 | Mountain Box | 1970 Isle of Man TT | Senior TT | 498cc Seeley |
| George Collis | 1 September 1970 | Handley`s Corner | 1970 Manx Grand Prix | Lightweight | Yamaha |
| Brian Finch | 9 June 1971 | Ballacraine | 1971 Isle of Man TT | 500cc Production Race | 500cc Suzuki |
| Maurice A.Jeffery | 12 June 1971 | Rhencullen | 1971 Isle of Man TT | Senior TT | 499cc Manx Norton |