In 2010, a network of 15 Denver-area museum and other cultural institutions came together with the purpose of increasing capacity to conduct evaluations. Like so many other communities, museum professionals in the Denver area believed in the value of evaluation; however, they lacked the resources, knowledge, and skills to develop and implement quality evaluations in their institutions. This article explores how the Denver-area Evaluation Network (DEN) has built evaluation capacity in museum professionals through a variety of multidisciplinary activities, including workshops, trainings, meetings, mentoring, and conducting both institutional and pan-institutional audience studies. The author shares lessons learned for others interested in starting and sustaining a similar network.