Task persistence is an important learning-related behavior associated with academic success. Although persistence has been related to motivational beliefs and cognitive skills, these constructs are typically studied independently, limiting our understanding of relations among them. The current investigation was designed to understand how these concepts related in early elementary school, a developmental period characterized by high motivational beliefs, growth in cognitive control, and the transition to school. Interest, perceived competence, and response inhibition were evaluated as predictors of children’s (N=73, Mage= 6.91 years) likelihood to demonstrate high persistence on a challenging puzzle task. Results provided evidence that motivational constructs are not sufficient for understanding differences in persistent behavior during this developmental period. Specifically, relations between interest and perceived competence and task persistence were only present for children with moderate to high response inhibition skills. Moreover, gender differences in task persistence emerged, indicating that while interest and perceived competence motivated all students to exhibit persistence, girls were still more likely to demonstrate task persistence than boys. Overall, findings suggest that task persistence in elementary school is a complex behavior that requires both cognitive control skills to support engagement and the motivation to continue engaging as task difficulty increases.