Youth homelessness has existed in Canada for decades, however, recent years have seen a significant increase in the number of young people with complex mental health issues who are also facing the isolation and struggle of homelessness. In communities across the country, the failure to address the specific needs of homeless youth with complex mental health needs, and the lack of appropriate, timely services is resulting in a crisis for homeless young people, their families and the community agencies that seek to support them. The results are devastating as Canada’s most marginalized young people fall between the cracks. They are often ineligible for, or not well served by children and adult mental health systems – nor well suited to services developed for homeless adults with complex mental health needs.