| Date | Name | Type | Location |
| January | |||
| Sun 18 Jan | Naas Wheelworx Dirty Weekend Duathlon Series (Race 1) |  | Naas Kildare  |
| Sat 24 Jan | Sperrin Duathlon Challenge (race 1) | | |
| February | |||
| Sun 08 Feb | Limerick Duathlon Series (Race 1) | (3.8km/16km/3.8km) | Limerick City Limerick  |
| Sat 21 Feb | Sperrin Duathlon Challenge (race 2) | | |
| Sun 22 Feb | Limerick Duathlon Series (Race 2) | (3.8km/16km/3.8km) | Limerick City Limerick |
| Sun 22 Feb | Naas Wheelworx Dirty Weekend Duathlon Series (race 2) | | Naas Kildare |
| Sat 28 Feb | Spokes Tramore Duathlon | | |
| March | |||
| Sat 07 Mar | Puck Warriors Duathlon | (5km/15km/5km) | Killorglin Kerry |
| Sat 14 Mar | Sperrin Duathlon Challenge (race 3) | | |
| Sun 15 Mar | Naas Wheelworx Dirty Weekend Duathlon Series (race 3) | | Naas Kildare |
| Sat 28 Mar | Carrick-on-Suir Triathlon Club Duathlon | | |
| Sun 29 Mar | Limerick Duathlon Series (Race 3) | (3.8km/16km/3.8km) | Limerick City Limerick |
| April | |||
| Sat 04 Apr | Waterford Duathlon | (5km/19km/3km) | Fenor Waterford |
| Sun 05 Apr | Northwest Duathlon | (10km/40km/5km) | Burnfoot Donegal  |
| Sun 05 Apr | Jealous Wall Duathlon | | |
| Sat 11 Apr | Portlaoise Sprint Try-athlon |  (750m/20km/5km) | Portlaoise |
| Sat 18 Apr | North Tipp Sprint | | |
| Sun 26 Apr | The Rock Duathlon | | |
| May | |||
| Sun 03 May | Tri-Donegal | | |
| Sun 03 May | Joey Hannan Memorial Triathlon | (1500/40km/10km) | University of Limerick Limerick |
| Wed 06 May | Duathlon Series (race 1) | (2.7km/13km/2.7km) | Phoenix Park Dublin |
| Sat 09 May | Queen's Duathlon Series (Race I) | | |
| Sun 10 May | Tri An Mhi M3 Duathlon | | |
| Sun 10 May | Tri Limits Sprint Triathlon | | |
| Wed 13 May | HiElbow Fun Triathlon | | |
| Sat 16 May | Ulster Bank Valentia Island Triathlon | (750m/20km/5km) | Valentia Island Kerry |
| Sat 16 May | Roe Valley Sprint Triathlon | (750m/20km/5km) | Limavady Derry |
| Sat 16 May | Dublin Super Sprints (race 1) | (400m/20km/3km) | Dublin Dublin |
| Sun 17 May | Fingal Sprint Triathlon | | |
| Sat 23 May | Northwest Sprint/Liam Ball | (750m/20km/5km) | Derry Derry |
| Sat 23 May | Barretstown Triathlon | | |
| Sat 30 May | TriAthy Sprint | (750m/20km/5km) | Athy Kildare |
| Sat 30 May | TriAthy Olympic | (1500m/40km/10km) | Athy Kildare |
| June | |||
| Wed 03 Jun | Duathlon Series (race 2) | (2.7km/13km/2.7km) | Phoenix Park Dublin |
| Wed 03 Jun | Midland Aquathon Series (race 1) | | |
| Sat 06 Jun | Fastnet Triathlon | (750m/20km/5km) | Schull Cork |
| Sat 06 Jun | The Rock Triathlon | | |
| Wed 10 Jun | Midland Aquathon Series (race 2) | | |
| Sat 13 Jun | Crooked Lake Triathlon | (750m/20km/5km) | Camlough Armagh |
| Sat 13 Jun | Queen's Duathlon Series (race 2) | | |
| Sat 13 Jun | Dublin Super Sprints (race 2) | (600m/20km/5km) | Dublin Dublin |
| Sat 13 Jun | Trilogy Junior Aquathon |  (Various by Age group) | Portlaoise |
| Wed 17 Jun | Wicklow Tri Amphibian King Aquathon Series (race 1) | (750m/5km) | Bray Wicklow |
| Wed 17 Jun | Midland Aquathon Series (race 3) | | |
| Sat 20 Jun | Mullaghmore Sprint Tri | (750m/20km/5km) | Mullaghmore Sligo  |
| Sat 20 Jun | SRAM Hook or by Crook Triathlon | (750m/20km/7km) | Dunmore East Waterford |
| Sat 20 Jun | Sive Triathlon, Cahirciveen, Co.Kerry | (750m/20km/5km) | Cahirciveen Kerry |
| Sat 27 Jun | Hell of the West - Limerick Triathlon Club | (1500/42km/10km) | Kilkee Clare |
| July | |||
| Wed 01 Jul | Duathlon Series (race 3) | (2.7km/13km/2.7km) | Phoenix Park Dublin |
| Sat 04 Jul | Tri-To-Beat Cancer Triathlon | | |
| Sun 05 Jul | Tri An Mhi Aquathon (beginner) | (750m/5km) | Kells Meath |
| Sat 11 Jul | PowerAde Salmon Run Triathlon | (750m/20km/5km) | Ballina Mayo |
| Sat 11 Jul | Carrick-on-Suir Triathlon Club Triathlon | (750m/20km/5km) | Carrick-on-Suir Tipperary |
| Sat 11 Jul | Dublin Super Sprints (race 3) | (750m/20km/5km) | Dublin Dublin |
| Sat 11 Jul | Dublin Super Sprints - Draft legal | (2.7km/8.5km/2.7km/8.5km/2.7km) | Phoenix Park Dublin |
| Sun 12 Jul | Sligo Triathlon | | |
| Sun 12 Jul | Lough Ine Triathlon | (1500m/46km/10km) | Baltimore Cork |
| Wed 15 Jul | Garda triathlon championship 09 | | |
| Wed 15 Jul | Spokes Tramore Aquathon (race 1) | | |
| Sat 18 Jul | triAthlone | | |
| Sat 18 Jul | Athlone ITU European Cup 2009 | | |
| Sat 18 Jul | try - a - triAthlone | | |
| Sat 18 Jul | Youghal Triathlon | | |
| Wed 22 Jul | Wicklow Tri Amphibian King Aquathon Series (race 2) | (750m/5km) | Bray Wicklow |
| Sat 25 Jul | King of The Hill | (750m/20km/5km) | Kinsale Cork |
| Sat 25 Jul | Galway Triathlon (Carna) | | |
| Sun 26 Jul | Beast of the East | (1500m/40km/10km) | Lough Dan Wicklow |
| Sun 26 Jul | City Of Lisburn Triathlon | (750m/20km/5km) | Lisburn City Antrim |
| Sun 26 Jul | City Of Lisburn Youth Aquathon | (200m/1200m) | Lisburn City Antrim |
| Wed 29 Jul | Spokes Tramore Aquathon (race 2) | | |
| August | |||
| Sat 01 Aug | Mourne Triathlon | | |
| Sun 02 Aug | Focus Ireland Triathlon | (750m/20km/5km) | Dublin Dublin |
| Wed 05 Aug | Duathlon Series (race 4) | | |
| Sat 08 Aug | Pulse Triathlon 2009 | (750m/20km/5km) | Blessington Wicklow |
| Sat 08 Aug | Kenmare Little Bo Peep Sprint | (1500m/40km/10km) | Kenmare Kerry |
| Sun 09 Aug | Dublin Docklands Aquathon | | |
| Wed 12 Aug | Spokes Tramore Aquathon (race 3) | | |
| Sat 15 Aug | The Caroline Kearney Memorial Triathlon | | |
| Sat 15 Aug | Lough Neagh Triathlon | | |
| Wed 19 Aug | Wicklow Tri Amphibian King Aquathon Series (race 3) | (750m/5km) | Bray Wicklow |
| Sat 22 Aug | Carlingford Triathlon | | |
| Sat 22 Aug | Laois Challenge Triathlon | (440m/19km/5km) | Portlaoise and Killenard |
| Sat 22 Aug | 3D Super Aquathlon | | |
| Sat 22 Aug | Spokes Tramore Triathlon | | |
| Sat 22 Aug | Éireman Warrior Kids | (Depends on age of Child) | Courtown Wexford |
| Sun 23 Aug | Eireman - Long Distance Triathlon | (3.8km/180km/42km) | Courtown Wexford |
| Sun 23 Aug | Éireman Middle Distance Triathlon | (1.9km/90km/21km) | Courtown Wexford |
| Sun 23 Aug | Éireman INTRO (relay) Teams of 3 to 7 | (3.8km/180km/42km) | Courtown Wexford |
| Sun 30 Aug | Half Ireman | (1.9km/90km/21km) | Groomsport Down |
| Sun 30 Aug | Dublin City Triathlon | | |
| Sun 30 Aug | Fermoy Blackwater Sprint Triathlon | (700m/20km/5km) | Fermoy Cork |
| Sun 30 Aug | Ireman 226 Challenge | (3.8km/180km/42km) | Groomsport Down |
| September | |||
| Sun 06 Sep | Lough Key Triathlon (Boyle Co.Roscommon) | (750m/23km/5km) | Boyle Roscommon |
| Sat 12 Sep | The Lost Sheep Half Iron Triathlon | (1.9km/83km/21km) | Kenmare Kerry |
| Sat 12 Sep | Tri An Mhi Sprint Triathlon | (750m/20km/5km) | |
| Sun 13 Sep | Loughrea Tri a tri | | |
| Sun 13 Sep | Loughrea Sprint Triathlon | (750m/20km/5km) | Loughrea Galway |
| Sat 19 Sep | Blacksod Point Triathlon | (1500m/40km/10km) | Belmullet Mayo |
| Sun 27 Sep | Aqua Cycle |  | |
