66 Background: The role of family caregivers (FCGs) is expanding in the U.S. health care system, but caregiver burden may adversely affect health. A functional social network of friends, family, and other acquaintances may alleviate FCG burden and improve FCG health by providing support resources. Ecomaps are visualizations that are created to organize and depict information on the size, quality and function of a person’s social network; and, thus, may be a useful tool for highlighting existing support and identifying where additional support is needed. Our objective was to test the feasibility of ecomapping to identify support networks within a sample of neuro-oncology caregivers. Methods: Participants included 4 spouse caregivers of neuro-oncology patients undergoing treatment at a national cancer hospital. Semi-structured interviews were conducted in person (n=3) and by phone (n=1). Participants either completed or were sent example ecomaps and, using the “think-aloud” approach, were asked to describe their social network. Participants were also asked about the process and usefulness of the ecomap. Interviews were recorded and transcribed and then content analyzed by two members of the research team. Results: All participants were female, mean age 35.5 (SD=5.5) years, caring for husbands whose mean age was 38.2 (SD=7.4) years. The mean length of relationship was 13 years (SD=2.2). All participants found ecomapping to be feasible, acceptable, and useful for identifying sources and types of social support. Network structure and sources of support varied by participant but consistently included religious networks and family. Quality and types of support also varied; each participant identified strengths and weaknesses within their networks. Participants were in favor of using ecomaps to explore their support networks with providers in a clinical setting and desired clinical guidance on developing and interpreting their ecomap. Conclusions: Despite a small sample, this pilot shows evidence for the feasibility and utility of ecomapping. This cost-effective tool could be more widely implemented to identify and harness existing social support and improve neuro-oncology caregiver quality of life.