Operational failure of clinical trials, the inability to achieve trial enrollment targets, and perform trial procedures, is a significant translational science problem. Over 50% of clinical trials fail to achieve their target enrollment. We developed a Clinical Trials Operation Risk Assessment tool to aid in prospectively estimating the risk of operational failure, identifying issues that could benefit from mitigation efforts, and to aid in investigator and institutional decisions regarding participating as a trial site. We report interim analysis from scoring 143 clinical trials over 4 years, and were able to track 21 trials, with analysis ongoing. We found that the CT-ORA risk score was significantly associated with a decision to participate in a trial (p=0.009), but not associated with reaching the trial accrual goal (p=0.38) at this interim analysis.