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 |
|---|---|---|---|---|---|
| John Henderson | 12 June 1998 | Rhencullen | 1998 Isle of Man TT | Senior TT | Honda 750cc |
| Adam Woodhall | 27 August 1998 | Ballaspur | 1998 Manx Grand Prix | Practice | 996cc Suzuki |
| Rob Wingrave | 27 August 1998 | Union Mills | 1998 Manx Grand Prix | Senior Classic | 500cc Norton |
| Chris East | 31 August 1998 | Kirk Michael | 1998 Manx Grand Prix | Senior Classic | Matchless |
| Bernadette Bosman | 31 May 1999 | Kirk Michael | 1999 Isle of Man TT | Practice Sidecar TT (Passenger) | 600cc Ireson Yamaha |
| Simon Beck | 1 June 1999 | 33rd Milestone | 1999 Isle of Man TT | Practice | Honda RC45 |
| Terry Fenton | 7 June 1999 | Hillberry Corner | 1999 Isle of Man TT | Sidecar TT (Passenger) | Honda CBR 600cc |