This Roadmap outlines a plan to advance ultradeep geothermal power—that is, geothermal systems with depths greater than 5 km—to commercial operation in Canada. Intended for policymakers, geothermal developers, technology companies, and investors, it identifies the most promising opportunities and priorities for technology, policy, and regulation; highlights key gaps; and provides guidance for how public and private investment can support efforts to rapidly close these gaps.