While knowledge mobilization strategies, such as training and technical assistance, have been used to facilitate the implementation of evidence-based practices, little is known about the role of networks in influencing implementation. In this article, we describe the role of a variety of networking strategies (regional training events, community of practice teleconference calls, and the creation of regional networks) used to implement Housing First (HF) in Canada during a three-year training and technical assistance initiative. We report on three main findings from research on this initiative. First, data from regional training events (n=110) revealed that 92% of participants wanted a regional HF network. Participants in the regional training events, as well as those who participated HF training needs assessment focus groups (k=11, n=83), believed that the networks should focus on mutual learning and influencing policy and have strong leadership and an open membership. Second, HF training events held in four regions of Canada (the West, the Prairies and northern territories, Ontario, and the Atlantic region) were very positively evaluated by participants (n=276) in terms of their value in increasing HF knowledge and comprehension, and overall satisfaction with the training. Third, field notes (n=146) were used to generate a narrative of HF networks that emerged from training and technical assistance activities, including a province-wide network in Ontario and practitioner-led networks in southwestern Ontario and British Columbia. We discuss how these network activities contributed to capacity-building in HF programs designed to end homelessness in Canada.