Indigenous youth are disproportionately represented in new HIV infection rates in Canada. Limited studies have evaluated longitudinal effects of arts-based approaches to HIV prevention with youth. The authors present a rationale and study protocol for an arts-based HIV and sexually transmitted infections (STI) prevention intervention with Northern and Indigenous youth in the Northwest Territories (NWT), Canada. This is a multi-centre non-randomised cohort pilot study using a pre-test/post-test design with a 12-month follow-up. The target population is Northern and Indigenous youth in eighteen communities in the NWT. The aim is to recruit 150 youth using venue-based sampling at secondary schools. Participants will be involved in an arts-based intervention, Fostering Open eXpression among Youth (FOXY). Participants will complete a pre-test, post-test survey directly following the intervention, and a 12-month follow up.