| Triathlon | 1989 European Triathlon Youth and Junior Championships | Genève |  SUI | Short Junior, Women | 🥇 |  GER |  | 
| Triathlon | 1990 European Triathlon Youth and Junior Championships | Montlucon |  FRA | Short Junior, Women | 🥉 |  GER | as Nicole Mertes | 
| Triathlon | 1991 European Triathlon Youth and Junior Championships | Losheim |  GER | Short Junior, Women | 🥈 |  GER | as Nicole Mertes | 
| Triathlon | 1991 World Triathlon Championships | Gold Coast |  AUS | Short Junior Team, Women | 🥇 |  GER | as Nicole Mertes | 
| Triathlon | 2000 Ironman Korea | Jeju |  KOR | Ironman, Women | 🥇 |  GER |  | 
| Triathlon | 2001 Ironman Germany | Roth |  GER | Ironman, Women | 🥉 |  GER |  | 
| Triathlon | 2002 Ironman Brazil | Florianópolis |  BRA | Ironman, Women | 🥇 |  GER |  | 
| Triathlon | 2002 Challenge Roth | Roth |  GER | Ironman, Women | 🥉 |  GER |  | 
| Triathlon | 2003 Ironman Japan | Gotö/Nagasaki |  JPN | Ironman, Women | 🥈 |  GER |  | 
| Triathlon | 2003 Challenge Roth | Roth |  GER | Ironman, Women | 🥇 |  GER |  | 
| Triathlon | 2003 Ironman Florida | Panama City |  USA | Ironman, Women | 🥈 |  GER |  | 
| Triathlon | 2004 Challenge Roth | Roth |  GER | Ironman, Women | 🥇 |  GER |  | 
| Triathlon | 2005 Challenge Roth | Roth |  GER | Ironman, Women | 🥈 |  GER |  | 
| Triathlon | 2007 Ironman Malaysia | Langkawi |  MAS | Ironman, Women | 🥇 |  GER |  | 
| Triathlon | 2007 Ironman Germany | Frankfurt am Main |  GER | Ironman, Women | 🥇 |  GER |  | 
| Triathlon | 2008 Ironman Germany | Frankfurt am Main |  GER | Ironman, Women | 🥈 |  GER |  | 
| Triathlon | 2009 Ironman Malaysia | Langkawi |  MAS | Ironman, Women | 🥈 |  GER |  | 
| Triathlon | 2009 Ironman Germany | Frankfurt am Main |  GER | Ironman, Women | 🥉 |  GER |  | 
| Triathlon | 2010 Ironman China | Haikou, Hainan |  CHN | Ironman, Women | 🥈 |  GER |  | 
| Triathlon | 2010 Tristar | Worms |  GER | TriStar111, Women | 🥉 |  GER |  | 
| Triathlon | 2011 Tristar | Worms |  GER | TriStar33.3, Women | 🥈 |  GER |  | 
| Triathlon | 2011 Ironman Regensburg | Regensburg |  GER | Ironman, Women | 🥉 |  GER |  |