Mankiyali is a Dardic language spoken in a handful of villages in Oghi Tehsil in Pakistan’s Khyber Pakhtunkhwa Province, undergoing the preliminary stages of documentation at the University of North Texas under the supervision of Dr. Sadaf Munshi. As a subset of ongoing documentary work on the phonetics and phonology of the language, the aim of this study is to determine the range of formant frequencies that make up phonemic vowels using spectrogram analysis in order to provide precision verification of research done up to this point. Data were collected in a sound-insulated recording booth from native speaker consultants using randomised elicitation lists and identical sentence frames composed of words containing target vowels in word-initial, medial, and final positions. Afterwards, targeted vowels elicited in the phrases were analysed in Praat (a software for speech analysis) by taking F1 and F2 formant values from spectral slices. Overall, we found that the phonetics and phonology of the language are relatively in-line with other languages of the region. However, several phenomena have been revealed by this study that make this language stand out from other regional languages: Mankiyali lacks a phonemic [ə], and the /u/~/uː/ length pair is phonetically the inverse of most languages of the region, presenting as [u] and [ʊː] respectively. This contrasts with the pair presenting as [u] and [ʊː] in languages like Hindustani. This has implications for further documentary work including orthographic development, comparative linguistic studies involving nearby languages, and a more holistic understanding of phonological processes in Dardic languages, which remain relatively poorly-documented.