Drop foot is a clinical condition that results from loss of dorsal function of ankle. Drop foot and sensory loss between the first and second toes occur due to a lesion in the proximal part of the deep peroneal nerve. Chronic exertional compartment syndrome (CECS) is a condition affecting primarily active, athletic people. The syndrome is characterized by recurrent, often severe muscle compartment pain that occurs with forceful exercise and relieves pain with rest. A forty-eight-year-old female patient was examined at our polyclinic with a foot drop beginning 1 month ago. Right ankle dorsiflexion was 0/5, other muscle strengths were normal. In the electroneuromyography (ENMG) study, there was no conduction slowing or block. Neurogenic changes were observed in the anterior tibialis, more prominent in the extensor digitorum brevis in the needle ENMG examination. Acute denervation findings were also observed in these muscles. No abnormality was observed in the peroneus longus examination. Axial and coronal T2-weighted magnetic resonance imaging scans showed increased intensities in favor of marked inflammation / soft tissue edema in the anterior tibialis muscle. History taking revealed that she had regular long walks. We found it worthwhile to present because of the rare occurrence of foot drop due CECS.