Organizace Extreme Challenge Trials pořádala první akci 7. 2. 1998 pod názvem 'ECT - February 1998'.

Do dnešního dne uspořádala celkem 10 akcí (USA).

DatumZeměNázev, adresa
15.3.2008EC - Trials
20.7.2002USAETC - July 2002
Spears Boxing School, Mt. Healthy, Ohio, United States
5.1.2002USAECT - 2001 U.S. MMA National Championships
Davenport, Iowa, United States
28.7.2001USAECT - July 2001
Clinton, Iowa, United States
7.4.2001USAECT - Extreme Challenge Trials
Davenport, Iowa, United States
29.7.2000USAETC - July 2000
Pig PenClinton, Iowa, United States
22.4.2000USAECT - April 2000
Stars and Stripes Nightclub, Davenport, Iowa, United States
6.11.1999USAECT - 1999 U.S. MMA National Championships
Stars and Stripes Nightclub, Davenport, Iowa, United States
5.12.1998USAECT - 1998 U.S. MMA National Championships
Vic Ferrari's Nightclub, Davenport, Iowa, United States
7.2.1998ECT - February 1998
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