Purpose: The British Columbia Network Environment for Indigenous Health Research (BC NEIHR) aims to support and advance research leadership among Indigenous communities, collectives and organizations (ICCOs) within British Columbia, Canada. The BC NEIHR provides support and funding to ICCOs for research development and knowledge sharing. This funding model supports ICCOs' self-determined health research by providing funds that are fully controlled by ICCOs, without the requirement of a non-Indigenous host organization. Design/methodology/approach: We conducted a critical analysis of 35 ICCO research development and knowledge-sharing grant applications to identify how ICCOs are decolonizing research and methodologies. Findings: Six themes were identified from ICCO decolonizing methodologies: (1) identified, driven, and led by Indigenous Peoples and community; (2) guidance from advisors, ethical guidelines, and local protocols; (3) follow traditional and cultural practices; (4) determine what is knowledge and ways to share knowledge; (5) celebrating the sharing and returning of knowledge and (6) advancing relationality: building and strengthening relationships. Originality/value: This paper highlights the impact of how the BC NEIHR and ICCOs are advancing decolonizing methodologies to support self-determined Indigenous health research led by, and grounded in, Indigenous communities. It reflects on the work of Maori scholar Linda Tuhiwai Smith's Decolonizing Methodologies: Research and Indigenous Peoples and contributes to the literature of decolonizing methodologies.