In this Perspective article we make the case for assessing National Biomechanics Day in order to better understand and maximum its impact. We present the opportunities and benefits that exist to assess National Biomechanics Day, as well as suggest assessment resources and tools that can be utilized. A case study is also included that details the ways that including assessment via a pre- and post-National Biomechanics Day survey provided insight into how our event changed student perceptions related to biomechanics, as well as informed us about how we might improve our event in the future.