| Event | Year | Start | End | Races | Teams |
|---|---|---|---|---|---|
| Hoosier Regatta | 1998 | 24 Oct | 25 Oct | 7 | 9 |
| World Championship | 1998 | 19 Sep | 25 Sep | 8 | 106 |
| Pre-Worlds & North American Championship | 1998 | 12 Sep | 17 Sep | 6 | 90 |
| Pacific Coast Championship | 1998 | 29 Aug | 30 Aug | 5 | 18 |
| Hospice Regatta | 1998 | 15 Aug | 16 Aug | 6 | 12 |
| Fishing Bay Annual | 1998 | 08 Aug | 09 Aug | 6 | 7 |
| Gim Hobelman | 1998 | 01 Aug | 02 Aug | 8 | |
| East Coast Championship | 1998 | 31 Jul | 02 Aug | 8 | 26 |
| High Sierra Regatta | 1998 | 11 Jul | 12 Jul | 3 | 13 |
| WRSC One Day 505 Regatta/Open House | 1998 | 27 Jun | 27 Jun | 4 | 11 |
| St Francis Regatta | 1998 | 27 Jun | 28 Jun | 6 | 15 |
| ABYC Memorial Day Regatta | 1998 | 23 May | 24 May | 7 | 12 |
| West River MidAtlantics | 1998 | 23 May | 24 May | 3 | 9 |
| Seattle One-design Centerboard and Keelboat Series | 1998 | 16 May | 17 May | 6 | 4 |
| Hampton Trapeze | 1998 | 15 May | 16 May | 3 | 5 |
| Hoover Spring Regatta | 1998 | 09 May | 10 May | 10 | 11 |
| Richmond High Performance Invitational | 1998 | 09 May | 10 May | 5 | 14 |
| Santa Cruz Spring Open Regatta | 1998 | 25 Apr | 26 Apr | 5 | 15 |
| West River Spring | 1998 | 25 Apr | 26 Apr | 6 | 10 |
| Hiper regatta | 1998 | 04 Apr | 05 Apr | 8 | 11 |
| Spring Dinghy | 1998 | 14 Mar | 15 Mar | 6 | 11 |
| Midwinter Championship | 1998 | 01 Jan | 04 Jan | 9 | 32 |